Questions 22-26 refer to a toy car which can move to the rig…

Questions 22-26 refer to a toy car which can move to the right or left on a horizontal surface along a straight line (the + distance axis). The positive direction is to the right. Different motions of the car are described below. Choose the letter (A to G) of the acceleration-time graph which corresponds to the motion of the car described in each statement. You may use a choice more than once or not at all. If you think that none is correct, answer choice J. Question 26: The car moves toward the right at a constant velocity.

This problem statement applies to questions 44-47: A sled i…

This problem statement applies to questions 44-47: A sled is pulled to the top of a hill. The sketch above indicates the shape of the hill. At the top of the hill the sled is released from rest and allowed to coast down the hill. At the bottom of the hill the sled has a speed v and a kinetic energy E (the energy due to the sled’s motion). Answer the following questions. In every case friction and air resistance are so small they can be ignored. Question 44: The sled is pulled up a steeper hill of the same height as the hill described above. How will the velocity of the sled at the bottom of the hill (after it has slid down) compare to that of the sled at the bottom of the original hill? Choose the best answer below. A. The speed at the bottom is greater for the steeper hill.B. The speed at the bottom is the same for both hills.C. The speed at the bottom is greater for the original hill because the sled travels further.D. There is not enough information given to say which speed at the bottom is faster.J. None of these descriptions is correct.

Questions 40-43 refer to a toy car which can move to the rig…

Questions 40-43 refer to a toy car which can move to the right or left along a horizontal line (the positive portion of the distance axis). The positive direction is to the right. Choose the correct velocity-time graph (A – G) for each of the following questions. You may use a graph more than once or not at all. If you think that none is correct, answer choice J. Question 43: Which velocity graph shows the car increasing its speed at a steady (constant) rate?

Questions 30-34 refer to collisions between a car and trucks…

Questions 30-34 refer to collisions between a car and trucks. For each description of a collision in the question below, choose the one answer from the possibilities A through J that best describes the forces between the car and the truck. A.  The truck exerts a greater amount of force on the car than the car exerts on the truck.B.  The car exerts a greater amount of force on the truck than the truck exerts on the car.C.  Neither exerts a force on the other; the car gets smashed simply because it is in the way of the truck.D.  The truck exerts a force on the car but the car doesn’t exert a force on the truck.E.  The truck exerts the same amount of force on the car as the car exerts on the truck.F.  Not enough information is given to pick one of the answers above.J.  None of the answers above describes the situation correctly. Question 34: In this question the truck is a small pickup and is the same weight as the car. The truck is standing still when the car hits it. Which choice describes the forces?