A. Two rubber spheres A (m₁ = 2 kg) and B (m₂ = 4 kg) are rolling on a level floor towards each other. They eventually collide with each other. For items 1 to 3, refer to the following choices a. a smaller b. same c. a greater d. cannot be determined 1. While rolling on the floor, the force that the floor exerts on sphere A is exerts on the floor. the force sphere A

A. Two rubber spheres A (m₁ = 2 kg) and B (m₂ = 4 kg) are rolling on a level floor towards each other. They eventually collide with each other. For items 1 to 3, refer to the following choices a. a smaller b. same c. a greater d. cannot be determined 1. While rolling on the floor, the force that the floor exerts on sphere A is exerts on the floor. the force sphere A

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter10: Rotational Motion And Angular Momentum

Section: Chapter Questions

Problem 37PE: (a) What is the angular momentum of the Moon in its orbit around Earth? (b) How does this angular...

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(a) What is the angular momentum of the Moon in its orbit around Earth? (b) How does this angular momentum compare with the angular momentum of the Moon on its axis? Remember that the Moon keeps one side toward Earth at all times. (c) Discuss whether the values found in parts (a) and (b) seem consistent with the fact that tidal effects with Earth have caused the Moon to rotate with one side always facing Earth.
(a) What is the period of rotation of Earth in seconds? (b) What is the angular velocity of Earth? (c) Given that Earth has a radius of 6.4106 m at its equator, what is the linear velocity at Earth's surface?
Gravity is an example of a central force that acts along the line connecting two spherical masses. As a planet orbits its sun, (a) how much torque does the suns gravitational force exert on the planet? (b) What is the change in the planets orbital angular momentum?
A cyclist rides a bicycle with a wheel radius of 0.500 m across campus. A piece of plastic on the front rim makes a clicking sound every time it passes through the fork. If the cyclist counts 320 clicks between her apartment and the cafeteria, how far has she traveled? (a) 0.50 km (b) 0.80 km (c) 1.0 km (d) 1.5 km (e) 1.8 km
(a) What is the acceleration due to gravity on the surface of the Moon? (b) On the surface of Mars? The mass of Mars is 6.4181023 kg and its radius is 3.38106 m.
11. A truck (m = 2700 kg) is passing the middle of a bridge whose radius of curvature is 350 meters. There is a scale mounted on the surface of the bridge and it reads 30,000 N as the truck passes through. What is the speed of the truck? a. 16.7 m/s c. 26 m/s b. 34 m/s d. 21 m/s R
The moon has a mass of 7.35x10²² kg, a radius of 1,738 km, and an angular velocity of 1 revolution every 27.3 days. Determine the moon's angular momentum. A. 5.91 x 10²⁹ kgm²/s B. 2.36 x 10²⁹ kgm²/s C. 3.34 x 10⁴⁰ kgm²/s D. 8.35 x 10⁴⁰ kgm²/s
Two blocks of wood (1 kg each) are connected with a 1m long rope. Another 1m long rope is tied to one of the blocks and connected to a rotating axle. The ropes can only hold 100N of tension before breaking. (Assume the ropes have no mass). !a. Derive equations for the tension in the ropes as a function of angular velocity.b. At what angular velocity will the rope break? c. Which rope breaks first?
12. A 0.20 kg block on a 0.50-m-long string swings in a circle on a horizontal, frictionless table at 75 rpm. A. What is the speed of the block? B. What is the tension in the string?
1. If no external torque acts on a body, its angular velocity remains conserved. A. False B. True 2. What is the angular velocity of an object traveling in a circle of radius 0.75m with a linear speed of 3.5 m/s? A. 4.3 rd/s B. 4.8 rd/s C. 4.9 rd/s D. 4.7 rd/s
8. At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 3.60 m/s, and an 87.0-kg person feels a 590-N force pressing against his back. What is the radius of the chamber? m
All three disks are made of sheet metal of the same material, and the diameters are 1.3 m , 2.6 m , and 3.9 m . Assume that the x-axis has its origin at the left-most point of the left-most object and it points to the right.Assume that the x-axis has its origin at the left-most point of the left-most object and it points to the right. a.Determine the location of the center of mass of the system s Express your answer with the appropriate units. B.Repeat the calculation for three solid spheres all made of the same metal and having the same diameters as in part A.