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Physics 101 Mechanics Q&A Archive of November 12, 2021

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November 12 of 2021

Find the equivalent resistance and the voltage in the circuit
A projectile is launched from a origin (0cm,0cm) on the tilted plane ( as in the class demonstration). The plane makes 40.0o with horizontal. The launcher sends the ball with a speed of 2.8m/s. At what maximum angle should the projectile be launched to hit target at (0.16m, 0.21m)…
A projectile is launched from a origin (0cm,0cm) on the tilted plane ( as in the class demonstration). The plane makes 40.0o with horizontal. The launcher sends the ball with a speed of 2.8m/s. At what maximum angle should the projectile be launched to hit target at (0.16m, 0.21m)…
20cm to the right of a +0.5x10^-6C charge is -2.1x10^-6C charge. Where, (relative to the +0.5x10^-6C charge) would a free electron be if the net electric force on the electron is 0?
Male rams butt heads at high speeds in a ritual to assert their dominance. How can the force of this collision be minimized so as to avoid damage to their brains?
Concrete is sold by the cubic yard. What isthe mass, in kilograms, of 1.00 cubic yard ofconcrete that is 5.00 times as dense aswater? (1.00 m = 1.094 yd, a cubic meter ofwater has a mass of 1,000 kg, and density ismass per unit volume
Concrete is sold by the cubic yard. What isthe mass, in kilograms, of 1.00 cubic yard ofconcrete that is 5.00 times as dense aswater? (1.00 m = 1.094 yd, a cubic meter ofwater has a mass of 1,000 kg, and density ismass per unit volume
During a fishing trip, two fishermen notice a large boulder falling into the ocean. A piece of driftwood, located 10 [m] from the position where the boulder entered the water, is lifted a maximum height of 5.0 [m] in the air due to the resulting wave. The fishermen are 100 [m] away from the…
An object has a volume of 4.0 m^3 andweighs 40,000 N. What will its apparentweight be in water of density 1000 kg/m^3?
An object has a volume of 4.0 m^3 andweighs 40,000 N. What will its apparentweight be in water of density 1000 kg/m^3?
An object has a volume of 4.0 m^3 andweighs 40,000 N. What will its apparentweight be in water of density 1000 kg/m^3?
a 1000 lb. crate is subjected to two applied forces at c. determine the moment about points a and b due to forces f1, f2, and the weight w.
A punter kicks a football at an angle of 44.0° to the ground. The football has an initial velocity of 28.0 m/s. Assume that forces due to air drag on the ball are insignificant. 1. How long is the football in the air? 2. How far does the football travel horizontally? 3. What is the…
Two Earth satellites, A and B, each of mass m, are to be launched into circular orbits about Earth's center. Satellite A is to orbit at an altitude of 5850 km. Satellite B is to orbit at an altitude of 15500 km. The radius of Earth REis 6370 km. (a) What is the ratio of the potential energy of…
Complete , The ocean tides... A. are most extreme at new moon and full moon. B. are at high tide at one time each 24 hour period. C. are most extreme near the poles. D. are caused by the moon.
A metal chunk is completely submerged in an oil bath of density roil = 0.7 g/mL. The metal has density of 7g/mL. The reading on the scale indicates that the metal has apparent weight of 49 N. What is the volume of this metal?
No
The density of water is 1.0 g/cm?. The density of theoil in the left column of the U-tube shown below is
Calculate the absolute pressure at an ocean depth of 1000 m.Assume the density of seawater is 1024 kg/m3 and that the airabove exerts a pressure of 101.3 kPa. (b) At this depth, whatforce must the frame around a circular submarine portholehaving a diameter of 30 cm exert to counterbalance the…
A 50-kg woman balances on one heel of apair of high heeled shoes. If the heel is circularand has a radius of 0.5 cm, what pressuredoes she exert on the floor?
In a car lift used in a service station, compressed air exerts a forceon a small piston that has a circular cross section and a radius of 5cm. This pressure is transmitted by a liquid to a piston that has aradius of 15 cm. What force must the compressed air exert to lift acar weighing 13300 N?…
Calculate the absolute pressure at an ocean depth of 1000 m.Assume the density of seawater is 1021 kg m? and that the airabove exerts a pressure of 101.3 APa. (b) At this depth, whatforce must the framearound a circular submarine portholehaving a diameter of 30 pm exert to counterbalance the…
a roof truss is subjected to two forces as shown. determine the moment due to forces f1 and f2 about support a and support b.
The compound AgF2 is an unstable compound. However, if formed, the compound acts as a very strong oxidizing agent. Why?
Given: A = 10.45 m, 25° North of East B 8.02 m, 50° West of South C 5.2 m, West What is the magnitude and direction of the resultant?
Determine this
Determine this
Help please
Boat A moves with constant velocity of 6m/s. starting from position down. Fine the angle in order for the projectile to hit the boat 5 seconds after starting, under the conditions given. How high is the hill above the water?
A particle moves in a straight line according to the law S=(t^3)-40t where S is in m. and t in seconds. When t=5 sec. Compute its velocity.
A particle moves in a straight line according to the law S=(t^3)-40t where S is in m. and t in seconds. When t=5 sec. Compute its velocity.
After tying one end of a rope to a stationary object you flick the free end so as to cause a sinusoidal standing wave that has a maximum displacement of 0.5 m and a wavelength of 1.33 m. Write the time dependent wave function in terms of the wave speed.
An object moving 0n a frictionless surface in +x direction suddenly explodes into 3 equal-mass pieces Afier the explosion given 2 pieces move in opposite directions but at equal speeds. in what direction does the 3rd piece move? Why ? (Conceplual question)
An object moving 0n a frictionless surface in +x direction suddenly explodes into 3 equal-mass pieces Afier the explosion given 2 pieces move in opposite directions but at equal speeds. in what direction does the 3rd piece move? Why ? (Conceplual question)
A small ball and a larger ball are placed in oil, water, and syrup. If they are fully submerged in each case, which combination will give the largest buoyant force?
A metal ball is placed in oil, water, and syrup. Which one has the smallest apparent weight
A littler girl is playing with her foot jump. The ball in her foot jump is in uniform circular motion and makes 20 revolutions in 4 seconds.
The best and latest technique for isolation, purification and separation of organic compounds is: (a) Crystallisation (b) Distillation (c) Sublimation (d) Chromatography
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms–1. How long does the body take to stop?
A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s–2. Calculate the initial thrust (force) of the blast.
5. Two people are pushing a disabled car. One exerts a force of 200 N east, the other a force of 150 N east. What is the net force exerted on the car? (Assume friction to be negligible)
Add the following vectors and determine the magnitude and direction of its resultant. 2.5 m/s, 45 degrees and 5.0 m/s, 270 deorees and 5.0 m/s, 330 degrees using component method.
A rigid body with a cylindrical cross-section is released from the top of a 30? incline. It rolls 10.0m to the bottom in 2.60 s. Find the moment of inertia of the body in terms of its mass m and radius r
Find the equivalent resistance and the voltage in the circuit
A projectile is launched from a origin (0cm,0cm) on the tilted plane ( as in the class demonstration). The plane makes 40.0o with horizontal. The launcher sends the ball with a speed of 2.8m/s. At what maximum angle should the projectile be launched to hit target at (0.16m, 0.21m)…
A projectile is launched from a origin (0cm,0cm) on the tilted plane ( as in the class demonstration). The plane makes 40.0o with horizontal. The launcher sends the ball with a speed of 2.8m/s. At what maximum angle should the projectile be launched to hit target at (0.16m, 0.21m)…
20cm to the right of a +0.5x10^-6C charge is -2.1x10^-6C charge. Where, (relative to the +0.5x10^-6C charge) would a free electron be if the net electric force on the electron is 0?
Male rams butt heads at high speeds in a ritual to assert their dominance. How can the force of this collision be minimized so as to avoid damage to their brains?
Concrete is sold by the cubic yard. What isthe mass, in kilograms, of 1.00 cubic yard ofconcrete that is 5.00 times as dense aswater? (1.00 m = 1.094 yd, a cubic meter ofwater has a mass of 1,000 kg, and density ismass per unit volume
An object has a volume of 4.0 m^3 andweighs 40,000 N. What will its apparentweight be in water of density 1000 kg/m^3?
An object has a volume of 4.0 m^3 andweighs 40,000 N. What will its apparentweight be in water of density 1000 kg/m^3?
a 1000 lb. crate is subjected to two applied forces at c. determine the moment about points a and b due to forces f1, f2, and the weight w.
A punter kicks a football at an angle of 44.0° to the ground. The football has an initial velocity of 28.0 m/s. Assume that forces due to air drag on the ball are insignificant. 1. How long is the football in the air? 2. How far does the football travel horizontally? 3. What is the…
Two Earth satellites, A and B, each of mass m, are to be launched into circular orbits about Earth's center. Satellite A is to orbit at an altitude of 5850 km. Satellite B is to orbit at an altitude of 15500 km. The radius of Earth REis 6370 km. (a) What is the ratio of the potential energy of…
No
A 50-kg woman balances on one heel of apair of high heeled shoes. If the heel is circularand has a radius of 0.5 cm, what pressuredoes she exert on the floor?
Calculate the absolute pressure at an ocean depth of 1000 m.Assume the density of seawater is 1021 kg m? and that the airabove exerts a pressure of 101.3 APa. (b) At this depth, whatforce must the framearound a circular submarine portholehaving a diameter of 30 pm exert to counterbalance the…
a roof truss is subjected to two forces as shown. determine the moment due to forces f1 and f2 about support a and support b.
The compound AgF2 is an unstable compound. However, if formed, the compound acts as a very strong oxidizing agent. Why?
Given: A = 10.45 m, 25° North of East B 8.02 m, 50° West of South C 5.2 m, West What is the magnitude and direction of the resultant?
Determine this
Determine this
Help please
A particle moves in a straight line according to the law S=(t^3)-40t where S is in m. and t in seconds. When t=5 sec. Compute its velocity.
After tying one end of a rope to a stationary object you flick the free end so as to cause a sinusoidal standing wave that has a maximum displacement of 0.5 m and a wavelength of 1.33 m. Write the time dependent wave function in terms of the wave speed.
An object moving 0n a frictionless surface in +x direction suddenly explodes into 3 equal-mass pieces Afier the explosion given 2 pieces move in opposite directions but at equal speeds. in what direction does the 3rd piece move? Why ? (Conceplual question)
An object moving 0n a frictionless surface in +x direction suddenly explodes into 3 equal-mass pieces Afier the explosion given 2 pieces move in opposite directions but at equal speeds. in what direction does the 3rd piece move? Why ? (Conceplual question)
A small ball and a larger ball are placed in oil, water, and syrup. If they are fully submerged in each case, which combination will give the largest buoyant force?
A metal ball is placed in oil, water, and syrup. Which one has the smallest apparent weight
The best and latest technique for isolation, purification and separation of organic compounds is: (a) Crystallisation (b) Distillation (c) Sublimation (d) Chromatography
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms–1. How long does the body take to stop?
A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s–2. Calculate the initial thrust (force) of the blast.
5. Two people are pushing a disabled car. One exerts a force of 200 N east, the other a force of 150 N east. What is the net force exerted on the car? (Assume friction to be negligible)
Add the following vectors and determine the magnitude and direction of its resultant. 2.5 m/s, 45 degrees and 5.0 m/s, 270 deorees and 5.0 m/s, 330 degrees using component method.
A rigid body with a cylindrical cross-section is released from the top of a 30? incline. It rolls 10.0m to the bottom in 2.60 s. Find the moment of inertia of the body in terms of its mass m and radius r