Quiz 9

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University Of Arizona *

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102

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Physics

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Dec 6, 2023

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Question 1 (2 points) Saved Listen A solid sphere rolls without slipping along a horizontal surface. What percentage of its total kinetic energy is rotational kinetic energy? Question 1 options: A) 33 % B) 50 % C) 12 % D) 75 % E) 29 % Question 2 (2 points) Saved Listen A meter stick is pivoted at the 0.50-m line. A 3.0-kg object is hung from the 0.15-m line. Where should a 5.0- kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)? Question 2 options: A) 0.06-m line B) 0.24-m line C) 0.56-m line D) 0.71-m line E) A 5.0-kg object cannot be placed anywhere on the meter stick to result in equilibrium in this system. Question 3 (2 points) Saved Listen Consider the following four objects: a hoop, a flat disk, a solid sphere, and a hollow sphere. Each of the objects has

mass M and radius R. The axis of rotation passes through the center of each object, and is perpendicular to the plane of the hoop and the plane of the flat disk. Which of these objects requires the largest torque to give it the same angular acceleration? Question 3 options: A) the solid sphere B) the hollow sphere C) the hoop D) the flat disk E) both the solid and the hollow spheres Question 4 (2 points) Saved Listen A rider on a motorcycle that has a mass of 195 kg is traveling with a speed of 24 m/s. Each of the two wheels of the motorcycle has a radius of 0.29 m and a moment of inertia of 0.46 ��·�2. What is the approximate total rotational kinetic energy of the wheels? Question 4 options: A) 800 J B) 1100 J C) 1500 J D) 3200 J E) 4100 J Question 5 (2 points) Saved Listen Complete the following statement: A body is in translational equilibrium

Question 5 options: A) only if it is at rest. B) only if it is moving with constant velocity. C) only if it is moving with constant acceleration. D) if it is either at rest or moving with constant velocity. E) if it is moving with either constant velocity or constant acceleration.

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