Problem 1 Velocity (m/s) 5 3 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1 .8 Time (s) -2 -4 A light sphere is thrown upwards on a cliff at t = 0s, and experiences a significant drag force. The velocity-time graph is shown above. Which of the following describes the direction of the sphere's acceleration just after the throw and the time that the acceleration first reaches zero? Direction of the acceleration Time the acceleration first reaches zero just after throw UP 0.2 s Up 1.2 s Down 0.2 s Down 1.2 sProblem 2 Velocity (m/s) - - -- 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 Time (s) A student pushes a cart horizontally in the positive direction on a frictionless horizontal table and the graph of the motion is shown above. At which of the following times does the student apply the greatest force to the cart? A. 0.65 B. 0.8s C. 1.0 s D. 1.45Problem 3 Acceleration (m/s/s) 20 16 12 0.5 1 1.5 2 2.5 3' 3.5 4 4.5 Time (s) -8 -12 -16 -20 The acceleration vs. time graph of an object moving in a straight line is shown above. The object starts at the origin with an initial velocity, vo Which of the following can be concluded from this graph? A. The object is in free fall. B. The object is furthest from the origin at t = 2 s. C. The object has a velocity of vo at t = 4 s. D. The object experiences a constant net force.Problem 4 A block slides without friction at speed v off a horizontal table and lands on the floor. Which of the following pairs of measurements would allow one to estimate v? Choose two correct answers. A. The horizontal distance from the table the block landed and the time in the air. B. The time in the air and the height of the table. C. The horizontal distance from the table the block landed and the height of the table. D. The vertical velocity just before reaching the ground and the time in the air.Problem 5 Which of the following position time graphs is consistent with a cart moving in a straight line with a net force in the opposite direction as its direction of motion? (A) (B) (C) (D)Problem 6 While a cart of mass m is moving uphill at speed v, a rope pulls on it parallel to the incline with a force of magnitude 7. What is the magnitude of the net force on the cart? V T A. (T-mg)sine B. (T+mg)sine C. T-mgsine D. T+mgsineProblem T A cart moving at a constant speed 1* moves inwards an ideal linear spring attached to a wall. The cart bounces off the spring and returns to the left again moving at speed 1!. Which of the following describes the acceleration of the cart? Choose two correct answers. If - Choose two correct answers: A The cart's acceleration is zero while not in contact with the spring. The cart's acceleration is oonstant while in oontact with the spring. E. C. The cart's acceleration changes direction when the cart changes direction. D. The magnitude of the carts acceleration is greatest when the cart is momentarily at rest. Problem 8 P V An asteroid moves toward planet P on the trajectory shown, only under the influence of planet P's gravitational field. Which of the following describes the speed and the acceleration of the asteroid at this moment? Speed Magnitude of the Acceleration A Increasing Increasing Increasing Constant B Constant Decreasing Decreasing DecreasingProblem 9 Planet 1 Planet 2 m F F m d Two planets, both of mass m, are a distance d apart from each other and exert a force F on each other. If Planet 2 is replaced by a planet of mass 2m, but the same size and located at the same distance away, what will the new force on each planet be? Force on Planet 1 from Planet 2 Force on Planet 2 from Planet 1 A F F 2F F F 2F 2F 2FProblem 10 wall 3 clay balls, labeled A, B, and Care launched from the same height at the same speed. A is launched at 30# above horizontal, B is launched horizontally, and C is launched 30" below the horizontal. They all hit the wall (before reaching the ground) in times to, to, and to respectively. Rank these times from least to greatest. . t= = t B. tomag D. This relationship cannot be determined without knowing the ratio of the masses of the blocks.Problem 14- A student stands on a scale holding a box. At a certain moment. they suddenly lift the has: over their head. then holds it there. Which of the following graphs best represents the reading of the s sale over time? A B allim] 'Ill' (If I'll": |l:| Problem 15 An astronaut is stuck at rest relative to a spacecraft, 15 meters away. Which of the following would be the most effective method to allow the astronaut's center of mass to move closer to the spacecraft? A. The astronaut swings their arms quickly towards the spacecraft, then slowly away many times in a row. The astronaut swings their arms quickly away from the spacecraft, then slowly towards it, many times in a row. C. The astronaut throws a rock towards the spacecraft. D. The astronaut throws a rock away from the spacecraft. Problem 16 before after A toy consisting of two identical spheres attached by a light string is thrown upwards with a clockwise rotation about its center of mass. As it moves upward, the string stretches out. Which of the following describes what happens to the angular momentum and the rotational kinetic energy about the center of mass of the two-sphere system? Angular Momentum Rotational Kinetic Energy A Stays constant Decreases B Stays constant Stays constant Increases Increases D Decreases Stays constantProblem 17 ...... A planet orbits a star in a circular orbit. Which of the following best explains why the kinetic energy of the planet is constant. A. The net force on the planet is zero. B. There is only one force on the planet. C. The net force on the planet is always parallel to its direction of motion. D. The net force on the planet is always perpendicular to its direction of motion.Problem 18 m d A block with mass m is compressed against a spring a distance 4x on a frictionless table, released, separates from the spring and lands a horizontal distance d away from the table with a kinetic energy K. If the block is replaced with a block of greater mass and the experiment is repeated, what will happen to the horizontal distance travelled and the kinetic energy just before landing? New horizontal distance traveled in the air New kinetic energy just before landing A Equal to d Equal to K Equal to d Greater than K Less than d Equal to K Less than d Greater than KProblem 19 A cylinder spinning counterclockwise is dropped onto a different cylinder spinning clockwise (both as viewed from the top) about a vertical axis. The two cylinders stick together and both spin counterclockwise. Which of the following can be concluded for certain from this observation? A. The dropped cylinder has a greater mass. B. The dropped cylinder has a greater rotational inertia about the center vertical axis. C. The dropped cylinder had a greater angular momentum about the center vertical axis before the collision. D. The dropped cylinder had a greater rotational kinetic energy about the center vertical axis before the collision.Problem 20 m m Two equal mass cylinders with strings wrapped around them are released from rest from the same height above the ground so that they rotate without slipping. The cylinder on the left is solid, while the cylinder on the right is hollow. Which cylinder hits the ground first and which cylinder's string has a greater tension? Hits the ground first Greater tension in its string A Solid cylinder Solid cylinder Solid cylinder Hollow cylinder Hollow cylinder Solid cylinder Hollow cylinder Hollow cylinder