Physics 211 Practice Final Exam(44 questions)The grading button and a description of the scoring criteria are at the bottom of this page.This exam consists of true-false questions worth 2 points each, three-choice multiple choice questions worth 3 points each, and five-choice multiple choice questions worth 6 points each. The maximum possible score is 194. Thisis an exam developed exclusively for practice so there are no results statistics available. QUESTION 1If 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) FalseQUESTION 2A stationary bomb will have no net momentum after an explosion.(T) True(F) FalseQUESTION 3A 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) FalseQUESTION 4A rotating object necessarily has a net torque on it.(T) True(F) FalseQUESTION 5During simple harmonic motion, there is no time at which the position, velocity, and acceleration all have the same sign (+,-, or 0).(T) True(F) FalseQUESTION 6Before a collision, two isolated masses have non-zero total kinetic energy. After the collision, their total kinetic energy cannot be zero.(T) True(F) FalseQUESTION 7If 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.(T) True(F) FalseQUESTION 8The 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) FalseQUESTION 9The 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) FalseQUESTION 10
The magnitude of the velocity of an object must change if the magnitude of its acceleration is a constant.(T) True(F) FalseQUESTION 11Three 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 statementscorrectly characterizes the relative kinetic energies (K) of the three balls just before hitting the ground.(a) K1= K2= K3(b) K1= K2> K3(c) K1= K2< K3QUESTION 12The 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 thesame mass which is smaller than the mass of the moving particle, i.e. M1> M2. After a sufficiently long time how many collisions will have occurred?