10) For this question, we know of two forces that act on a person. We need to optimize force F such that the person can accelerate upward. Let's start by drawing a force diagram.
We know that if a person wants to accelerate, the net force upward should be greater than zero. We can set it up like so and solve for F.
This answer makes sense. It tells us that we need to pull upward with a force greater than the weight of the person in order to cause an upward acceleration.
Although by technicality having a force greater than or equal to 2W, choices D and E, would allow the person to accelerate, these choices do not define all magnitudes of F which allow the person to accelerate.
Answer: C
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