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Physics 101 Mechanics
October 2021
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Physics 101 Mechanics
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October 21, 2021
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October 21 of 2021
The table that follows lists four pairs of initial and final angles of a wheel on a moving car. The elapsed time for each pair of angles is 1.90 s. For each of the four pairs, determine the average angular velocity (magnitude and direction as given by the algebraic sign of your answer).
. A boy sleds down a hill and onto a frictionless ice-covered lake at 10.0 m/s. In the middle of the lake is a 1000-kg boulder. When the sled crashes into the boulder, he is propelled backwards from the boulder. The collision is an elastic collision. If the boy’s mass is 40.0 kg and the…
A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 16.0 m. She pushes in a direction 25.0° below the horizontal. A 42.0-N frictional force opposes the motion of the cart.
An orange light wave of frequency 500 THz exists in a region of space. (a) By how much would the phase vary in a billionth of a second? (b) How long would be the wave train corresponding to that interval in time? (Because of the exceedingly high frequency of light there is no existent means of…
A light bar AD is suspended from a cable BE and supports a 20-kg block at C. The ends A and D of the bar are in contact with frictionless vertical walls. Determine the tension in cable BE and the reactions at A and D.
A crate with a mass of 80.0 kg is pulled up an inclined surface by an attached cable, which is driven by a motor. The crate moves a distance of 50.0 m along the surface at a constant speed of 1.5 m/s. The surface is inclined at an angle of 30.0° with the horizontal. Assume friction is…
Find the total acceleration of the car
An aluminum wing on a passenger jet is 31 m long when its temperature is 28°C. At what temperature would the wing be 8 cm (0.08 m) shorter?
b) A horizontal disc of radius 9.00 cm rotates about an axis which passes vertically through the center of the disc with angular velocity of 100 r.p.m. A small particle of mass 10g is dropped onto the disc and sticks to the edge of the disc. If the angular velocity is reduced to 90 r.p.m,…
3a.Write down the continuity and momentum equations in Cartesian form for a two-dimensional steady and incompressible laminar boundary layer. 33.From the momentum equation obtained in question 3 show that the momentum equation for an incompressible turbulent layer is given as A(del u)/(del…
Calculate the net torque on the beam. When the axis of rotation is at point O
A fidget spinner of radius 0.05 m has a moment of inertia kg m2 and is rotating at 8.4 rad s-1 . A large fly whose mass is 0.3 kg lands onto the edge of the rotating spinner. Calculate the angular speed of the system after the fly falling onto the spinner.
A 35.0 kg sled is pulled by a rope at a constant speed along a flat level surface with a 45.5 N force at 31.0o above the horizontal. A) What is the coefficient of friction? B) What is the acceleration of the sled? C) If Carlos decides to move the statue again, but this time while it is…
A raw egg and a hard-boiled egg are rotating about the same axis of rotation with the same initial angular velocity. With the aid of diagram, explain which egg will rotate longer.
A man pushes a wall and fails to displace it. He does (a) Negative work (b) Positive but not maximum work (c) No work at all (d) Maximum work
Assuming the coefficient of friction between the road and tyres of a car to be 0.5, the maximum speed with which the car can move round a curve of 40.0 m radius without slipping, if the road is unbanked, should be
The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the distance will be [CPMT 1984] (a) The same (b) Doubled (c) Halved (d) Four times
body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is
If the normal force is doubled, the coefficient of friction is (a) Not changed (b) Halved (c) Doubled (d) Tripled
A stone weighing 1 kg and sliding on ice with a velocity of 2 m/s is stopped by friction in 10 sec. The force of friction (assuming it to be constant) will be
A body of mass 2 kg is moving on the ground comes to rest after some time. The coefficient of kinetic friction between the body and the ground is 0.2. The retardation in the body is
A block of mass 5 kg lies on a rough horizontal table. A force of 19.6 N is enough to keep the body sliding at uniform velocity. The coefficient of sliding friction is
A child weighing 25 kg slides down a rope hanging from the branch of a tall tree. If the force of friction acting against him is 2 N, what is the acceleration of the child
A child is pulling a box of mass 10 Kg. What is the standard force acting and also calculate the frictional force if the coefficient of friction ? is 0.3?
Nancy of mass 40 Kg is slipping on the frost. If the coefficient of friction acting is 0.45. Find the frictional force acting between her and the frost layer?
body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is
On the horizontal surface of a truck (u = 0.6), a block of mass 1 kg is placed. If the truck is accelerating at the rate of 5m/sec2 then frictional force on the block will be
A block of mass 50 kg slides over a horizontal distance of 1 m. If the coefficient of friction between their surfaces is 0.2, then work done against friction is
The maximum speed of a car on a road turn of radius 30m; if the coefficient of friction between the tyres and the road is 0.4; will be
Assuming the coefficient of friction between the road and tyres of a car to be 0.5, the maximum speed with which the car can move round a curve of 40.0 m radius without slipping, if the road is unbanked, should be
A motorcyclist of mass m is to negotiate a curve of radius r with a speed v. The minimum value of the coefficient of friction so that this negotiation may take place safely, is
On a rough horizontal surface, a body of mass 2 kg is given a velocity of 10 m/s. If the coefficient of friction is 0.2 and 2 g ? 10 m / s , the body will stop after covering a distance of
A car turns a corner on a slippery road at a constant speed of 10 m / s . If the coefficient of friction is 0.5, the minimum radius of the arc in meter in which the car turns is
body of 10 kg is acted by a force of 129.4 N if g = 9.8 m / sec². The acceleration of the block is 10 m / s². What is the coefficient of kinetic friction
body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is
block of mass 5 kg is on a rough horizontal surface and is at rest. Now a force of 24 N is imparted to it with negligible impulse. If the coefficient of kinetic friction is 0.4 and 2 g ? 9.8 m / s , then the acceleration of the block is
A lift is moving downwards with an acceleration equal to acceleration due to gravity. A body of mass m kept on the floor of the lift is pulled horizontally. If the coefficient of friction is u, then the frictional resistance offered by the body is
The maximum speed that can be achieved without skidding by a car on a circular unbanked road of radius R and coefficient of static friction ? , is
A uniform metal chain is placed on a rough table such that one end of chain hangs down over the edge of the table. When one-third of its length hangs over the edge, the chain starts sliding. Then, the coefficient of static friction is
A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. the weight of the block is
A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N. The coefficient of friction between wall and body is 0.3. Then the frictional force is equal to
This is the first part, please help me. I’m very stuck and I need something to help me so I can get a better understanding.
This is the backside of the other paper. Please, I’m very stuck and I don’t get it.
heavy uniform chain lies on a horizontal table-top. If the coefficient of friction between the chain and table surface is 0.25, then the maximum fraction of length of the chain, that can hang over one edge of the table is
If a ladder weighing 250N is placed against a smooth vertical wall having coefficient of friction between it and floor is 0.3, then what is the maximum force of friction available at the point of contact between the ladder and the floor
A block of mass 2 kg is kept on the floor. The coefficient of static friction is 0.4. If a force F of 2.5 Newtons is applied on the block as shown in the figure, the frictional force between the block and the floor will be
A box is lying on an inclined plane what is the coefficient of static friction if the box starts sliding when an angle of inclination is 60o
A 20 kg block is initially at rest on a rough horizontal surface. A horizontal force of 75 N is required to set the block in motion. After it is in motion, a horizontal force of 60 N is required to keep the block moving with constant speed. The coefficient of static friction is
A block of 1 kg is stopped against a wall by applying a force F perpendicular to the wall. If μ = 0.2 then minimum value of F will be
Which is a suitable method to decrease friction (a) Ball and bearings (b) Lubrication (c) Polishing (d) All the above
Maximum value of static friction is called [BHU 1995; RPET 2000] (a) Limiting friction (b) Rolling friction (c) Normal reaction (d) Coefficient of friction
A force of 98 N is required to just start moving a body of mass 100 kg over ice. The coefficient of static friction is
Maximum value of static friction is called (a) Limiting friction (b) Rolling friction (c) Normal reaction (d) Coefficient of friction
A force of 98 N is required to just start moving a body of mass 100 kg over ice. The coefficient of static friction is
To cover a sensational Coachella Musio Festival. Bocat mast dtive 100 miles frocn Clendera to Coschella at 12 taoon and stay at a hotel nearby on Hallowecth. He wanss to got there is 2 lours. what velocity nust he drive on average? Contider the relationship between velocity and tisve.
Convert 190 ounces to Kg
Convert 190 psi to Kg
need help pls
Convert 60mm to metre
the sun has a mass of 1.99 x10^30 kg and the mass of 5.98 x10^24 kg and they sit 1.5 x 10 ^11m apart
While shooting pool, you propel the cue ball at a speed of 1.58 m/s. It collides with the 8-ball (initially stationary), propelling the 8-ball into a corner pocket. The cue ball is deflected by 40.0° from its original path by the collision, and it moves away from the collision with a speed of…
QUESTION 4 By using x and y components determine: a) The required value of a if the resultant of the three forces shown is to be vertical [10 Marks! b) The corresponding magnitude of the resultant [10 Marks 30° 100 N 200 N 150 N
A string of a Cello has a linear density of 1.70g/m and a length of 0.70m. The tension of the string is adjusted so that the fundamental frequency is 220. What is the tension of the string
what is the maximum speed with which a 1200 kg car can round a turn of radius 90
The table that follows lists four pairs of initial and final angles of a wheel on a moving car. The elapsed time for each pair of angles is 1.90 s. For each of the four pairs, determine the average angular velocity (magnitude and direction as given by the algebraic sign of your answer).
. A boy sleds down a hill and onto a frictionless ice-covered lake at 10.0 m/s. In the middle of the lake is a 1000-kg boulder. When the sled crashes into the boulder, he is propelled backwards from the boulder. The collision is an elastic collision. If the boy’s mass is 40.0 kg and the…
A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 16.0 m. She pushes in a direction 25.0° below the horizontal. A 42.0-N frictional force opposes the motion of the cart.
An orange light wave of frequency 500 THz exists in a region of space. (a) By how much would the phase vary in a billionth of a second? (b) How long would be the wave train corresponding to that interval in time? (Because of the exceedingly high frequency of light there is no existent means of…
A light bar AD is suspended from a cable BE and supports a 20-kg block at C. The ends A and D of the bar are in contact with frictionless vertical walls. Determine the tension in cable BE and the reactions at A and D.
A crate with a mass of 80.0 kg is pulled up an inclined surface by an attached cable, which is driven by a motor. The crate moves a distance of 50.0 m along the surface at a constant speed of 1.5 m/s. The surface is inclined at an angle of 30.0° with the horizontal. Assume friction is…
An aluminum wing on a passenger jet is 31 m long when its temperature is 28°C. At what temperature would the wing be 8 cm (0.08 m) shorter?
b) A horizontal disc of radius 9.00 cm rotates about an axis which passes vertically through the center of the disc with angular velocity of 100 r.p.m. A small particle of mass 10g is dropped onto the disc and sticks to the edge of the disc. If the angular velocity is reduced to 90 r.p.m,…
3a.Write down the continuity and momentum equations in Cartesian form for a two-dimensional steady and incompressible laminar boundary layer. 33.From the momentum equation obtained in question 3 show that the momentum equation for an incompressible turbulent layer is given as A(del u)/(del…
Calculate the net torque on the beam. When the axis of rotation is at point O
A fidget spinner of radius 0.05 m has a moment of inertia kg m2 and is rotating at 8.4 rad s-1 . A large fly whose mass is 0.3 kg lands onto the edge of the rotating spinner. Calculate the angular speed of the system after the fly falling onto the spinner.
A 35.0 kg sled is pulled by a rope at a constant speed along a flat level surface with a 45.5 N force at 31.0o above the horizontal. A) What is the coefficient of friction? B) What is the acceleration of the sled? C) If Carlos decides to move the statue again, but this time while it is…
A raw egg and a hard-boiled egg are rotating about the same axis of rotation with the same initial angular velocity. With the aid of diagram, explain which egg will rotate longer.
A man pushes a wall and fails to displace it. He does (a) Negative work (b) Positive but not maximum work (c) No work at all (d) Maximum work
Assuming the coefficient of friction between the road and tyres of a car to be 0.5, the maximum speed with which the car can move round a curve of 40.0 m radius without slipping, if the road is unbanked, should be
The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the distance will be [CPMT 1984] (a) The same (b) Doubled (c) Halved (d) Four times
body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is
If the normal force is doubled, the coefficient of friction is (a) Not changed (b) Halved (c) Doubled (d) Tripled
A stone weighing 1 kg and sliding on ice with a velocity of 2 m/s is stopped by friction in 10 sec. The force of friction (assuming it to be constant) will be
A body of mass 2 kg is moving on the ground comes to rest after some time. The coefficient of kinetic friction between the body and the ground is 0.2. The retardation in the body is
A block of mass 5 kg lies on a rough horizontal table. A force of 19.6 N is enough to keep the body sliding at uniform velocity. The coefficient of sliding friction is
A child weighing 25 kg slides down a rope hanging from the branch of a tall tree. If the force of friction acting against him is 2 N, what is the acceleration of the child
A child is pulling a box of mass 10 Kg. What is the standard force acting and also calculate the frictional force if the coefficient of friction ? is 0.3?
Nancy of mass 40 Kg is slipping on the frost. If the coefficient of friction acting is 0.45. Find the frictional force acting between her and the frost layer?
body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is
On the horizontal surface of a truck (u = 0.6), a block of mass 1 kg is placed. If the truck is accelerating at the rate of 5m/sec2 then frictional force on the block will be
A block of mass 50 kg slides over a horizontal distance of 1 m. If the coefficient of friction between their surfaces is 0.2, then work done against friction is
The maximum speed of a car on a road turn of radius 30m; if the coefficient of friction between the tyres and the road is 0.4; will be
Assuming the coefficient of friction between the road and tyres of a car to be 0.5, the maximum speed with which the car can move round a curve of 40.0 m radius without slipping, if the road is unbanked, should be
A motorcyclist of mass m is to negotiate a curve of radius r with a speed v. The minimum value of the coefficient of friction so that this negotiation may take place safely, is
On a rough horizontal surface, a body of mass 2 kg is given a velocity of 10 m/s. If the coefficient of friction is 0.2 and 2 g ? 10 m / s , the body will stop after covering a distance of
A car turns a corner on a slippery road at a constant speed of 10 m / s . If the coefficient of friction is 0.5, the minimum radius of the arc in meter in which the car turns is
body of 10 kg is acted by a force of 129.4 N if g = 9.8 m / sec². The acceleration of the block is 10 m / s². What is the coefficient of kinetic friction
body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is
block of mass 5 kg is on a rough horizontal surface and is at rest. Now a force of 24 N is imparted to it with negligible impulse. If the coefficient of kinetic friction is 0.4 and 2 g ? 9.8 m / s , then the acceleration of the block is
A lift is moving downwards with an acceleration equal to acceleration due to gravity. A body of mass m kept on the floor of the lift is pulled horizontally. If the coefficient of friction is u, then the frictional resistance offered by the body is
The maximum speed that can be achieved without skidding by a car on a circular unbanked road of radius R and coefficient of static friction ? , is
A uniform metal chain is placed on a rough table such that one end of chain hangs down over the edge of the table. When one-third of its length hangs over the edge, the chain starts sliding. Then, the coefficient of static friction is
A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. the weight of the block is
A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N. The coefficient of friction between wall and body is 0.3. Then the frictional force is equal to
This is the first part, please help me. I’m very stuck and I need something to help me so I can get a better understanding.
heavy uniform chain lies on a horizontal table-top. If the coefficient of friction between the chain and table surface is 0.25, then the maximum fraction of length of the chain, that can hang over one edge of the table is
If a ladder weighing 250N is placed against a smooth vertical wall having coefficient of friction between it and floor is 0.3, then what is the maximum force of friction available at the point of contact between the ladder and the floor
A block of mass 2 kg is kept on the floor. The coefficient of static friction is 0.4. If a force F of 2.5 Newtons is applied on the block as shown in the figure, the frictional force between the block and the floor will be
A box is lying on an inclined plane what is the coefficient of static friction if the box starts sliding when an angle of inclination is 60o
A 20 kg block is initially at rest on a rough horizontal surface. A horizontal force of 75 N is required to set the block in motion. After it is in motion, a horizontal force of 60 N is required to keep the block moving with constant speed. The coefficient of static friction is
A block of 1 kg is stopped against a wall by applying a force F perpendicular to the wall. If μ = 0.2 then minimum value of F will be
Which is a suitable method to decrease friction (a) Ball and bearings (b) Lubrication (c) Polishing (d) All the above
Maximum value of static friction is called [BHU 1995; RPET 2000] (a) Limiting friction (b) Rolling friction (c) Normal reaction (d) Coefficient of friction
A force of 98 N is required to just start moving a body of mass 100 kg over ice. The coefficient of static friction is
Maximum value of static friction is called (a) Limiting friction (b) Rolling friction (c) Normal reaction (d) Coefficient of friction
A force of 98 N is required to just start moving a body of mass 100 kg over ice. The coefficient of static friction is
Convert 190 ounces to Kg
Convert 190 psi to Kg
Convert 60mm to metre
the sun has a mass of 1.99 x10^30 kg and the mass of 5.98 x10^24 kg and they sit 1.5 x 10 ^11m apart
While shooting pool, you propel the cue ball at a speed of 1.58 m/s. It collides with the 8-ball (initially stationary), propelling the 8-ball into a corner pocket. The cue ball is deflected by 40.0° from its original path by the collision, and it moves away from the collision with a speed of…
A string of a Cello has a linear density of 1.70g/m and a length of 0.70m. The tension of the string is adjusted so that the fundamental frequency is 220. What is the tension of the string
what is the maximum speed with which a 1200 kg car can round a turn of radius 90