Quiz
Rotational Dynamics Physics
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Perguntas do quiz (10)
1Seen in the picture below, M1 and M2 are connected by a string that is stretched over a pulley. The two masses are released from rest and M1 is 2.5m under its initial position after 1s. If the radius of the pulley is 0.7m, what is the angular acceleration of the pulley? Counterclockwise is the positive direction.
- AA. 7.1 rad/s^2
- BB. 5 rad/s^2
- CC. 3.5rad/s^2
- DD. -5m/s^2
2A student releases a cylinder M1 from the top of an incline shown below. What is the force in the free body diagram that allows the cylinder to roll down the incline? Friction is not negligible.
- AA. A
- BB. B
- CC. C
- DD. None of the Above
3Three students, A, B, and C, are standing on a spinning wheel that is currently at rest. Student A is 0.7m away from the radius, student B is 1.3m away from the radius, and student C is 1.5m away from the radius. The students take turns walking on the spinning wheel while maintaining the initial radius. Student A takes 5s, student B takes 6.5s, and student C takes 4s to turn the spinning wheel 7 times. Find the final linear speed for each trial.
- AA
- BB
- CC
- DD
- AA
4A soccer player kicks a ball with a 30cm radius vertically from the ground. As the ball shoots through the air. If the player kicked the ball with the force of 10N, what is the torque exerted on the ball? Air resistance is negligible.
- AA. 3N⋅m
- BB. 300N⋅m
- CC. There is no torque applied, because there is no air resistance present.
- DD. There is no torque applied, because the force is directed toward the center of the ball.
5A student conducts an experiment to find the frictional force between a floor and a ball. The student rolls a 0.4kg ball on a floor and records the time until the ball stops. The ball has a radius of 50cm and spins while traveling. If the initial ω of the ball is 10rad/s and it spins for 7.3s, what is the frictional force?
- AA. 0.274N
- BB. 0.548N
- CC. 0.685N
- DD. 1.38N
6What would be the mass of “m” if the mass of M is 500g? The net torque of this system is zero.
- AA. 200kg
- BB. 100g
- CC. 0.2kg
- DD. 20g
7A wheel with a radius of 20 cm is rolling on a frictionless track. When the wheel traveled 4m during 10 seconds, what is the average angular velocity of the wheel during the interval?
- AA. 2 rad/s
- BB. 4 rad/s
- CC. 8 rad/s
- DD. 10 rad/s
8A skater with a mass of 40kg is moving around a circular track with constant velocity. When the skater is pushed with a force of 50N in the positive direction (tangent to the circle), and the radius of the track is 3m, what would be the correct choice for both the tangential and angular acceleration?
- AA. 1.67 m/s^2, 0.750 rad/s^2
- BB. 1.25 m/s^2, 0.417 rad/s^2
- CC. 1.67 m/s^2, 0.557 rad/s^2
- DD. 1.25 m/s^2, 0.358 rad/s^2
9A wheel initially at rest starts rolling on a frictionless track. The wheel travels 2.0 m, and the linear acceleration measured at the moment is 3m/s^2. If the wheel has a radius of 30cm, how much time should pass since the wheel first started moving?
- AA. 1.155s
- BB. 1.274s
- CC. 1.554s
- DD. 1.629s
10A solid cylinder consisting of an outer radius r1 and inner radius r2 is pivoted on a frictionless axle as shown below. A string is wound around the outer radius and is pulled to the right with a force of F1=2N, while a second string is wound around the inner radius and is pulled downwards with a force of F2=3N. If r1=0.5m and r2=0.3m, and counterclockwise is the positive direction, what is the net torque acting on the cylinder?
- AA. 0.2N.m
- BB. 0.1N.m
- CC. -0.2N.m
- DD. -0.1N.m
Informações
- Descrição
- grade 10 physics Quiz sobre Rotational Dynamics Physics, criado por Soohyun Lee em 03-04-2021.
- Autor
- Soohyun Lee
- Idioma
- English
- Visualizações
- 6
- Etiquetas
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