1.. A crate of mass 49 kg is attached to one end of a string, and the other end

Question

1.. A crate of mass 49 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person as in the figure below. If the person pulls with a force of 88 N, what is the crate's acceleration? (Assume that upward is the positive direction. Indicate the direction with the sign of your answer.)

                     m/s2

A crate of mass 49 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person as in the figure below. If the person pulls with a force of 88 N, what is the crate's acceleration? (Assume that upward is the positive direction. Indicate the direction with the sign of your answer.)

Explanation / Answer

T = 88 N

on crate

T    - 49g = 49a

a = 88 - 49g / 49 = - 8m/s2  

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