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Physics 101 Mechanics
October 2021
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Physics 101 Mechanics
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October 24, 2021
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October 24 of 2021
7. Two people are pushing on a \( 40 \mathrm{~kg} \). One is pashing with \( 250 \mathrm{~N} \) to the left and the other is pushing with a force of \( 180 \mathrm{~N} \) to the right. a) If the box is not moving, what is the frictional force? b) What is the coefficient of friction?
7. Two people are pushing on a \( 40 \mathrm{~kg} \). One is prahing with \( 290 \mathrm{~N} \) to the left and the other is pushing with a force of \( 180 \mathrm{~N} \) to the right. a) If the box is not moving what is the frictional force? b) What is the coefficient of friction? \[ \sqrt{392…
Two people are pushing on a 40 kg box. One is pushing with 250 N to the left and the other is pushing with a force of 180 N to the right. If the box is not moving, what is the frictional force?
Physics!
Physics help please:)
physics homework problem
Im stuck on this physics problem
PHYSICS HELP:)
which quantity is change if we change the reference frames
Your cousin has built a model rocket that she wishes to launch in your back yard. You’re a little worried by this (you live near an airport) and ask her for some details. She says to you: “When I launch the rocket straight upwards (vertically), it will accelerate at 3.5g (g = the…
A tomato is thrown upward. As it rises, the gravitational force does a. negative and its kinetic energy decreases b. negative work and its kinetic energy increases c. positive work and its kinetic energy decreases d. positive work and its kinetic energy increases e. zero work and its kinetic…
What is the solution ?
A child is sliding on a sled at 1.8 m/s to the right. You stop the sled by pushing on it for 0.70 s in a direction opposite to its motion. If the mass of the child and sled is 41 kg , what is the magnitude of the average force you need to apply to stop the sled?
What’s the tension on a sphere with a mass of 35 Kg with a work of 550 J and a distance of 1.5 m
Figure 10.35 shows several forces acting at different locations and angles on a flywheel. We have F1=20N, F2=30N, F3=30N, and r=0.5m. Find the net torque on the flywheel about an axis through the center.
A steel wire 30 m long is connected to a copper wire 20 m long. Both wires have a center diameter of 1 mm and are pulled together with a force of 150 N. Find the time. All the transverse waves in the two wires move from one end of the wire to the other.
To create artificial gravity, the space station shown in the drawing is rotating at a rate of 2.20 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 2.00. Each chamber A simulates an acceleration due to gravity of 9.50 m/s2. Find values for (a) rA, (b) rB, and (c) the…
A rocket is used to place a synchronous satellite in orbit about the earth. What is the speed of the satellite in orbit? 4070 m/s 3070 m/s 2070 m/s
The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle ((r = 11.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.630, and the…
You have 750 g of water at 10.0? in a large insulated beaker. How much boiling water at 100.0 must you add to this beaker so that the final temperature of the mixture will be 75??
State Lenz’s law
At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.5 L. Determine per cylinder: a) the volume…
An air-standard dual cycle has a compression ratio of 9.1 and displacement of Vd = 2.2 L. At the beginning of compression, p1 = 95 kPa, and T1 = 290 K. The heat addition is 4.25 kJ, with one quarter added at constant volume and the rest added at constant pressure. Determine: a) each of…
here are the measurements to calculate the coefficient of static friction of the bottom and top of box on wood (cuttingboard): Length of board: 45.50 ± 0.05 cm Height when bottom of box starts to slip: 31.50 ± 0.05 cm Height when top of box starts to slip: 23.40 ± 0.05 cm Calculate the μs for…
Calculate the required power of a 1,400kg climbing a 10 ° hill (a steep hill) at a constant speed of 80km / h.
If two small balls, A and B, attract gravitationally with a force of magnitude F. If we double both masses and the separation of the balls, what will be the magnitude of the attractive force on each one?
If in a circular turn in your car on a level road, when you hit a piece of ice, what will make the friction force between the tires and the road zero while the vehicle is on the ice?
A person walks 25 m in a direction of 700 North of East, then 40 m in a direction of 550 West of North, and then 20 m in a direction of 150 South of West. How far is the person from where they started?
Mars has two moons, each much smaller than the earth’s moon. The smaller of these two bodies, Deimos, isn’t quite spherical, but we can model it as a sphere of radius 6.3 km. Its mass is 1.8 * 1015 kg. At what speed would a projectile move in a very low orbit around Deimos?
You are seated in your physics class next to another student 0.60 m away. Estimate the magnitude of the gravitational force between you. Assume that you each have a mass of 65 kg.
A motorcyclist in the Globe of Death, pictured here, rides in a 2.2-m-radius vertical loop. To keep control of the bike, the rider wants the normal force on his tires at the top of the loop to equal or exceed his and the bike’s combined weight. What is the minimum speed at which the rider can?…
What is the maximum speed with which a 1500 kg car can make a turn around a curve of radius 20 m on a level (unbanked) road without sliding? (This radius turn is about what you might expect
A box that regularly weighs 1,245N travels in an elevator moving a constant speed of 9.8m / s. If a person was standing on a bathroom scale in the elevator, what would the scale read?
A force of F = (280) N is applied to the manual drill at point A. Values for the figure are given in the following table. Note the figure may not be to scale. Variable Value d 1 0.2 m d 2 0.5 m ? 1 100 degrees ? 2 …
Communication satellites appear to “hover” over one point on the earth’s equator. A satellite that appears to remain stationary as the earth rotates is said to be in a geostationary orbit. What is the radius of the orbit of such a satellite?
What is the magnitude of the gravitational force of the earth on a 60 kg person? The earth has mass 5.98 * 1024 kg and radius 6.37 * 106 m.
7. Two people are pushing on a \( 40 \mathrm{~kg} \). One is pashing with \( 250 \mathrm{~N} \) to the left and the other is pushing with a force of \( 180 \mathrm{~N} \) to the right. a) If the box is not moving, what is the frictional force? b) What is the coefficient of friction?
7. Two people are pushing on a \( 40 \mathrm{~kg} \). One is prahing with \( 290 \mathrm{~N} \) to the left and the other is pushing with a force of \( 180 \mathrm{~N} \) to the right. a) If the box is not moving what is the frictional force? b) What is the coefficient of friction? \[ \sqrt{392…
Two people are pushing on a 40 kg box. One is pushing with 250 N to the left and the other is pushing with a force of 180 N to the right. If the box is not moving, what is the frictional force?
Physics!
Physics help please:)
physics homework problem
Im stuck on this physics problem
PHYSICS HELP:)
which quantity is change if we change the reference frames
Your cousin has built a model rocket that she wishes to launch in your back yard. You’re a little worried by this (you live near an airport) and ask her for some details. She says to you: “When I launch the rocket straight upwards (vertically), it will accelerate at 3.5g (g = the…
A tomato is thrown upward. As it rises, the gravitational force does a. negative and its kinetic energy decreases b. negative work and its kinetic energy increases c. positive work and its kinetic energy decreases d. positive work and its kinetic energy increases e. zero work and its kinetic…
What is the solution ?
A child is sliding on a sled at 1.8 m/s to the right. You stop the sled by pushing on it for 0.70 s in a direction opposite to its motion. If the mass of the child and sled is 41 kg , what is the magnitude of the average force you need to apply to stop the sled?
What’s the tension on a sphere with a mass of 35 Kg with a work of 550 J and a distance of 1.5 m
Figure 10.35 shows several forces acting at different locations and angles on a flywheel. We have F1=20N, F2=30N, F3=30N, and r=0.5m. Find the net torque on the flywheel about an axis through the center.
To create artificial gravity, the space station shown in the drawing is rotating at a rate of 2.20 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 2.00. Each chamber A simulates an acceleration due to gravity of 9.50 m/s2. Find values for (a) rA, (b) rB, and (c) the…
A rocket is used to place a synchronous satellite in orbit about the earth. What is the speed of the satellite in orbit? 4070 m/s 3070 m/s 2070 m/s
The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle ((r = 11.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.630, and the…
You have 750 g of water at 10.0? in a large insulated beaker. How much boiling water at 100.0 must you add to this beaker so that the final temperature of the mixture will be 75??
State Lenz’s law
At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.5 L. Determine per cylinder: a) the volume…
An air-standard dual cycle has a compression ratio of 9.1 and displacement of Vd = 2.2 L. At the beginning of compression, p1 = 95 kPa, and T1 = 290 K. The heat addition is 4.25 kJ, with one quarter added at constant volume and the rest added at constant pressure. Determine: a) each of…
here are the measurements to calculate the coefficient of static friction of the bottom and top of box on wood (cuttingboard): Length of board: 45.50 ± 0.05 cm Height when bottom of box starts to slip: 31.50 ± 0.05 cm Height when top of box starts to slip: 23.40 ± 0.05 cm Calculate the μs for…
Calculate the required power of a 1,400kg climbing a 10 ° hill (a steep hill) at a constant speed of 80km / h.
If two small balls, A and B, attract gravitationally with a force of magnitude F. If we double both masses and the separation of the balls, what will be the magnitude of the attractive force on each one?
If in a circular turn in your car on a level road, when you hit a piece of ice, what will make the friction force between the tires and the road zero while the vehicle is on the ice?
A person walks 25 m in a direction of 700 North of East, then 40 m in a direction of 550 West of North, and then 20 m in a direction of 150 South of West. How far is the person from where they started?
Mars has two moons, each much smaller than the earth’s moon. The smaller of these two bodies, Deimos, isn’t quite spherical, but we can model it as a sphere of radius 6.3 km. Its mass is 1.8 * 1015 kg. At what speed would a projectile move in a very low orbit around Deimos?
You are seated in your physics class next to another student 0.60 m away. Estimate the magnitude of the gravitational force between you. Assume that you each have a mass of 65 kg.
A motorcyclist in the Globe of Death, pictured here, rides in a 2.2-m-radius vertical loop. To keep control of the bike, the rider wants the normal force on his tires at the top of the loop to equal or exceed his and the bike’s combined weight. What is the minimum speed at which the rider can?…
What is the maximum speed with which a 1500 kg car can make a turn around a curve of radius 20 m on a level (unbanked) road without sliding? (This radius turn is about what you might expect
A box that regularly weighs 1,245N travels in an elevator moving a constant speed of 9.8m / s. If a person was standing on a bathroom scale in the elevator, what would the scale read?
A force of F = (280) N is applied to the manual drill at point A. Values for the figure are given in the following table. Note the figure may not be to scale. Variable Value d 1 0.2 m d 2 0.5 m ? 1 100 degrees ? 2 …
Communication satellites appear to “hover” over one point on the earth’s equator. A satellite that appears to remain stationary as the earth rotates is said to be in a geostationary orbit. What is the radius of the orbit of such a satellite?
What is the magnitude of the gravitational force of the earth on a 60 kg person? The earth has mass 5.98 * 1024 kg and radius 6.37 * 106 m.