Question

6(A)A donkey pulls a block across a rough horizontal surface at constant speed v by applying force F, as shown below. The arrows in the diagram correctly indicate the directions, but not necessarily the magnitudes, of the various forces on the block. Which of the following pairs of relations among the force magnitudes W, k, N and F must be true? (Hint: think what happens if you break F into two components, in the horizontal and vertical directions) (3 points) a. F = k and N = W b. F = k and N > W c. F = k and N < W d. F > k and N = W e. F > k and N > W f. F > k and N < W g. F < k and N = W h. F < k and N > W i. F < k and N < W 6(B) Three balls of equal masses are launched with equal speeds from the same height above the ground, in the directions shown below. In descending order, rank (a) the speeds with which the balls hit the ground. (2 points) (b) the order they arrive the ground. (2 points) 6(C) Consider the scenario of a high-speed bus colliding head-on with a bug, splattering the unfortunate buy onto the windshield. In this collision, which one, the bug or the bus experiences a greater force? Defend your answer. (3 points)

          6(A)A donkey pulls a block across a rough horizontal surface at constant speed v by applying force F, as shown below. The arrows in the diagram correctly indicate the directions, but not necessarily the magnitudes, of the various forces on the block. Which of the following pairs of relations among the force magnitudes W, k, N and F must be true? (Hint: think what happens if you break F into two components, in the horizontal and vertical directions) (3 points)
a. F = k and N = W
b. F = k and N > W
c. F = k and N < W
d. F > k and N = W
e. F > k and N > W
f. F > k and N < W
g. F < k and N = W
h. F < k and N > W
i. F < k and N < W
6(B) Three balls of equal masses are launched with equal speeds from the same height above the ground, in the directions shown below. In descending order, rank
(a) the speeds with which the balls hit the ground. (2 points)
(b) the order they arrive the ground. (2 points)
6(C) Consider the scenario of a high-speed bus colliding head-on with a bug, splattering the unfortunate buy onto the windshield. In this collision, which one, the bug or the bus experiences a greater force? Defend your answer. (3 points)

6(A)A donkey pulls a block across a rough horizontal surface at constant speed v by applying force F, as shown below. The arrows in the diagram correctly indicate the directions, but not necessarily the magnitudes, of the various forces on the block. Which of the following pairs of relations among the force magnitudes W, k, N and F must be true? (Hint: think what happens if you break F into two components, in the horizontal and vertical directions) (3 points)
a. F = k and N = W
b. F = k and N > W
c. F = k and N < W
d. F > k and N = W
e. F > k and N > W
f. F > k and N < W
g. F < k and N = W
h. F < k and N > W
i. F < k and N < W
6(B) Three balls of equal masses are launched with equal speeds from the same height above the ground, in the directions shown below. In descending order, rank
(a) the speeds with which the balls hit the ground. (2 points)
(b) the order they arrive the ground. (2 points)
6(C) Consider the scenario of a high-speed bus colliding head-on with a bug, splattering the unfortunate buy onto the windshield. In this collision, which one, the bug or the bus experiences a greater force? Defend your answer. (3 points)

Added by Zachary A.

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