Copyright 2014 Edmentum - All rights reserved. AP Physics Blizzard Bag 2014-2015 Classical Mechanics 1. A block of mass 4.0 kg is attached to the end of a spring. The spring stiffness constant is 25 N/m. When the spring is stretched to a displacement of 60 cm, the spring-block system begins oscillating in simple harmonic motion. What is the maximum speed of the block? A. 0.24 m/s B. 2.8 m/s C. 1.5 m/s D. 0.60 m/s E. 0.40 m/s 2. A batter at home plate hits a baseball. The ball travels high into the air, and then falls down into the waiting mitt of the center fielder. What property of the baseball does not change during its path from batter to center fielder? (Assume energy lost to air resistance is negligible.) A. potential energy B. vertical and horizontal position C. kinetic energy D. velocity E. total mechanical energy 3. A car is traveling at a constant velocity of 43 km/h (12 m/s). It then approaches a flat curve of radius 25 m. How could the driver avoid skidding on the curve, yet still travel as fast as possible? (Assume a coeffecient of static friction μ = 0.50 and the acceleration due to gravity g = 9.8 m/s 2.) A. slow the car to a speed of 32 km/h (8.9 m/s) B. slow the car to a speed of 28 km/h (7.8 m/s) C. maintain the current speed D. The answer depends on the mass of the car. E. slow the car to a speed of 40 km/h (11 m/s)
4. A man rolls a bowling ball down an extremely long, flat surface. The ball gradually loses speed and slows to a stop. What is the best explanation for this observation? A. The total energy of the system (ball, surface, and air) was gradually reduced because of heat. B. The total mechanical energy of the ball was gradually reduced because of heat. C. The ball had kinetic energy, but no potential energy. D. The ball had potential energy, but no kinetic energy. E. The ball was not sufficiently smooth to roll indefinitely. 5. Which of the following examples describes a collision that is completely inelastic? A. Two billiard balls collide and bounce backward, each losing a little of their initial speed. B. A billiard ball strikes the bumper of a pool table and then bounces backward at the same speed. C. A bullet traveling at high speed passes through a sheet of paper, slowing down only a little. D. Two billiard balls collide and bounce backward at the same speed. E. A wad of bubble gum is thrown at the wall and sticks there. 6. How do the following weights compare? (Assume all objects are on Earth's surface.) I. the weight of a 7-kg bowling ball at rest on the floor II. the weight of a 7-kg bowling ball rolling down the alley III. the weight of a 7-kg bowling ball dropping on someone's foot A. Weight III > Weight II > Weight I B. Weight III > Weights I and II, which are equal. C. Weight III < Weights I and II, which are equal. D. All three weights are equal. E. Weight III < Weight II < Weight I
7. A 50-kg wooden crate is at rest on a flat surface. A woman wants to push the crate forward. What force must she apply to set the crate in motion? (Assume the coefficient of static friction to be 0.40) A. 12 N B. 200 N C. 120 N D. 20 N E. 160 N 8. A worker is asked to lift a 15-kg sack to a height of 10 m above a loading dock. Which of these methods, if any, will do the least amount of work against gravity on the sack? A. The worker will do the same amount of work using any of these methods. B. The worker can push the sack up a steep ramp. C. The worker can use a pulley to lift the sack. D. The worker can pull the sack up a steep ramp. E. The worker can push the sack up a very long, gently-sloped ramp. 9. A book is at rest on a table. According to Newton's first law of motion, which explanation best describes the reason why the book is not moving? A. No net force is acting on the book. B. The table is pushing on the book. C. The book lacks the ability to move on its own. D. No forces are acting on the book. E. Gravity is pulling the book against the table. 10. A train is traveling due north at 80 km/h. A baseball pitcher stands on the rear platform of the train and throws a baseball due south at 100 km/h. To an observer on the ground, what is the initial velocity of the baseball? A. 100 km/h, due south B. 20 km/h, due north C. 90 km/h, due south D. 180 km/h, due south E. 20 km/h, due south
11. Which of the following expressions equals the acceleration due to Earth's gravity (g)? (Note that G is the universal gravitational constant, me is the mass of Earth, and re is the radius of Earth) A. G / r 2 B. GmE / r C. me r D. GmE / re 2 E. GmEr 2 12. Five horses raced around an oval track. Klondike, the winning horse, raced at an average velocity of 34 mph. Snowball, who finished second, was traveling at 40 mph when Klondike crossed the finish line. Which of the following statements must be true? I. Snowball was gaining on Klondike when Klondike crossed the finish line. II. Klondike's top velocity during the race was greater than 40 mph. III. Snowball's average velocity was less than 34 mph. A. III only B. I only C. II and III only D. I and III E. I, II, and III 13. A log of mass 80 kg and length 4.0 meters is floating in a pond. A girl of mass 25 kg sits at one end of the log, and a boy of mass 40 kg sits at the other end, causing the log to tip slowly in his direction. How far must the boy move toward the log's center to keep the log balanced? (Assume that the mass of the log is distributed evenly across its length.) A. 1.25 m B. 1.0 m C. 2.0 m D. 0.75 m E. 0.25 m
14. Marble A has twice the mass of Marble B. Marble A is placed at rest on a tabletop. Marble B is rolled toward Marble A and collides with it. Marble B's speed just before the collision is 8.0 m/s. Marble A then rolls forward while Marble B is at rest. What is the initial speed of Marble A after the collision? A. The mass of Marble A is needed to answer this question. B. 8 m/s C. 12 m/s D. 16 m/s E. 4.0 m/s 15. A friend tells a story about a frog placed at the 50-cm mark, or midpoint, of a meterstick. The frog then takes 7 hops along the length of the meterstick, and each hop is 7 cm long. The friend does not say in which direction the frog hopped, or whether or not the frog changed direction from one jump to the next. Based on this information, the frog could have finished its 7 jumps at the marks for A. centimeter-marks that are multiples of 7. B. 1 cm, 15 cm, 29 cm, 43 cm, 57 cm, 71 cm, 85 cm, and 99 cm. C. 1 cm and 99 cm only. D. centimeter-marks that are multiples of 14. E. 1 cm, 8 cm, 15 cm, 22 cm, 29 cm, 36 cm, 43 cm, 50 cm, 57 cm, 64 cm, 71 cm, 78 cm, 85 cm, 92 cm, and 99 cm.