Question: The 7 7 - l b force P is applied to the 2 1 0 - l b crate, which is stationary before the force

The

77 - l b

force P is applied to the

210 - l b

crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left.

Assume

_{s} = 0.40,_{k} = 0.31 .

The 7 7 - l b force P is applied to the 2 1 0 - l

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