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melisa1 [442]
3 years ago
8

Once you have pulled hard enough to start the box moving upward, what is the magnitude F of the upward force you must apply to t

he rope to start raising the box with constant velocity?

Physics
1 answer:
Brrunno [24]3 years ago
8 0

Answer:

F = mg/2

Explanation:

The full question is attached to the solution of this question.

The forces acting on the box include the weight of the box, the force, F and the tension in the wire attached.

The force required to pull up the box at constant velocity normally is equal to the weight of the box.

W = mg

But in this setup,

The force balance on the box

Sum of upward forces = sum of downward forces.

T + F = mg

But the pulley is frictionless, hence, the force, F is equal to the tension in the wire.

T = F

2F = mg

F = mg/2

Hope this Helps!!!

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