1993 Multiple Choice

# 1993 Multiple Choice - 1993 Multiple Choice Questions 1. In...

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1993 Multiple Choice Questions 1. In which of the following situations would an object be accelerated? I. It moves in a straight line at constant speed. II. It moves with uniform circular motion. III. It travels as a projectile in a gravitational field with negligible air resistance. (A) I only (B) III only (C) I and II only (D) II and III only (E) I, II, and III. 2. A ball falls straight down through the air under the influence of gravity. There is a retarding force F on the ball with magnitude given by F = bv , where v is the speed of the ball and b is a positive constant. The magnitude of the acceleration a of the ball at any time is equal to which of the following? (A) g - b (B) g - bv/m (C) g + bv/m (D) g/b (E) bv/m 3. An ideal spring obeys Hooke's law, F = -kx. A mass of 0.50 kilogram hung vertically from this spring stretches the spring 0.075 meter. The value of the force constant for the spring is most nearly (A) 0.33 N/m (B) 0.66 N/m (C) 6.6 N/m (D) 33 N/m (E) 66 N/m 4. The figure above shows a rough semicircular track whose ends are at a vertical height h. A block placed at point P at one end of the track is released from rest and slides past the bottom of the track. Which of the following is true of the height to which the block rises on the other side of the track? (A) It is equal to h/2 π (B) It is equal to h/4 (C) It is equal to h/2 (D) It is equal to h (E) It is between zero and h; the exact height depends on how much energy is lost to friction. 5. An object is released from rest on a planet that has no atmosphere. The object falls freely for 3.0 meters in the first second. What is the magnitude of the acceleration due to gravity on the planet? (A) 1.5 m s 2 (B) 3.0 m/s 2 (C) 6.0 m/s 2 (D) 10.0 m/s 2 (E) 12.0 m/s 2 6. If Spacecraft X has twice the mass of Spacecraft Y, then true statements about X and Y include which of the following? I. On Earth, X experiences twice the gravitational force that Y experiences. II. On the Moon, X has twice the weight of Y. III. When both are in the same circular orbit, X has twice the centripetal acceleration of Y. (A) I only (B) III only (C) I and II only (D) II and III only (E) I, II, and III 7. Two pucks are attached by a stretched spring and are initially held at rest on a frictionless surface, as shown above. The pucks are then released simultaneously. If puck I has three

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times the mass of puck II, which of the following quantities is the same for both pucks as the spring pulls the two pucks toward each other? (A) Speed (B) Velocity (C) Acceleration (D) Kinetic energy (E) Magnitude of momentum
8. The two spheres pictured above have equal densities and are subject only to their mutual gravitational attraction. Which of the following quantities must have the same magnitude for both spheres? (A) Acceleration (B) Velocity (C) Kinetic energy (D) Displacement from the center of mass (E) Gravitational force 9. When an object oscillating in simple harmonic motion is at its maximum displacement from the equilibrium position. which of the following is true of the values of its speed and the magnitude of the restoring force?

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## This note was uploaded on 01/22/2011 for the course PHY 201 taught by Professor Wei during the Spring '10 term at Sam Houston State University.

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1993 Multiple Choice - 1993 Multiple Choice Questions 1. In...

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