Physics

Problem

10\,\text{kg}

cart is initially at rest while two students pull on it with horizontal forces of

25\,\text{N}

east and

25\,\text{N}

west, producing no motion. A third student then applies an additional

5.0\,\text{N}

force east for

2.0\,\text{s}

and afterward removes that force. Which statement best describes the cart’s translational motion? a) It accelerates eastward during the

2.0\,\text{s}

, then comes to rest immediately after the extra force is removed. b) It accelerates eastward during the

2.0\,\text{s}

, then continues moving eastward at a constant speed once the extra force is removed. c) It remains at rest throughout the experiment because the forces on the cart cancel on average over the

2.0\,\text{s}

interval. d) It moves westward after the extra force is removed because the original

25\,\text{N}

westward pull is unbalanced at that point.

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