# PHYS 211 Final - Physics 111 Practice Final Exam QUESTION 1...

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Physics 111 Practice Final Exam QUESTION 1 If two ends of a rope are pulled with forces of equal magnitude and opposite direction, the tension at the center of the rope must be zero. (T) True (F) False QUESTION 2 A stationary bomb will have no net momentum after an explosion. (T) True (F) False QUESTION 3 A pitcher throws a ball past a stationary batter. If the ball has no spin and is thrown straight, then the ball has no angular momentum with respect to the batter. (T) True (F) False QUESTION 4 A rotating object necessarily has a net torque on it. (T) True (F) False QUESTION 5 During simple harmonic motion, there is no time at which the position, velocity, and acceleration all have the same sign (+,-, or 0). (T) True (F) False QUESTION 6 Before a collision, two isolated masses have non-zero total kinetic energy. After the collision, their total kinetic energy cannot be zero. (T) True (F) False QUESTION 7 If two objects, a uniform disk and a uniform sphere, have the same moment of inertia about their axes of rotation and the same angular velocity, then the disk has the larger rotational kinetic energy.

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(T) True (F) False QUESTION 8 The beat frequency created by the interference of two waves becomes greater as the difference in frequency between the two waves is increased. (T) True (F) False QUESTION 9 The magnitude of the total force acting on a ball rolling without slipping down a ramp is greater than the magnitude of the total force acting on the same ball if it slides down the ramp without friction. (T) True (F) False QUESTION 10 The magnitude of the velocity of an object must change if the magnitude of its acceleration is a constant. (T) True (F) False QUESTION 11 Three identical balls are thrown from the edge of a cliff, each with the same initial speed. Ball 1 is thrown directly upward. Ball 2 is thrown directly downward. Ball 3 is thrown horizontally. Which of the following statements correctly characterizes the relative kinetic energies (K) of the three balls just before hitting the ground.
(a) K 1 = K 2 = K 3 (b) K 1 = K 2 > K 3 (c) K 1 = K 2 < K 3 QUESTION 12 The motion of a system of three particles is constrained to move in a straight line (1-D). One particle is initially moving to the right, while the other particles are stationary, as shown in the figure. The stationary particles have the same mass which is smaller than the mass of the moving particle, i.e. M 1 > M 2 . After a sufficiently long time how many collisions will have occurred? (a) 2 (b) 3 (c) 4 QUESTION 13 A body is executing simple harmonic motion with amplitude A. What is the total distance traveled by the body in a time equal to its period? (a) A

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## This note was uploaded on 05/20/2008 for the course PHYS 211 taught by Professor Liss during the Spring '08 term at University of Illinois at Urbana–Champaign.

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PHYS 211 Final - Physics 111 Practice Final Exam QUESTION 1...

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