Question
Qiuestiots 14-21 refer to a toy car which can move to the right or eft along a horizomal line (the positive part of the distance axis). n) t A force is applied to the car. Choose the one force graph (A through ED for each statement below which could allow the desenibed motion of the car to continue. You may use a choice more than once or not at all. If you think that none is cornect, answer choice J -14. The car moves toward the right away from the origin) with a D) F steady (constant) velocity Tite 15. The cans at rest. 16·The car moves toward the right and is speeding up at a steady rate constant acceleration). 17. The car moves toward the left (toward the origin) with a steady constant) velocity 18. The car moves toward the right and is slowing down at a steady rate (D fconstant acceleration). F 19. The car moves toward the left and is speeding up at a steady rate (constant acceleration). -20. The car moves toward the right. speeds up and then slows down -21. The car was pushed toward the right and then released. Which graph describes the force after the car is released. Tine None of these graphs is correct. Force and Motor 1969 99 R. K Theron &D; Sckalot T-3 Force and Mobon Conceptual Evalaation 3/
Explanation / Answer
14) Velocity is positive and constant. Hence Graph A is correct.
15) Velocity is zero. Hence Graph E is correct.
16) Velocity increases over time in the positive(right side) direction. Hence graph C is correct.
17) Velocity is constant and negative. Hence graph B is correct.
18) The car is slowing from positive velocity to zero. Hence Graph H is correct.
19) The velocity is increasing in the negative direction. hence Graph D is correct.
20) The speed increases and then decreases. Hence Graph F is correct.
21) The force acting on the car after it is released is zero. Hence graph E is correct.