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A 35 kg crate is at rest on the floor. A man attempts to push it...

A 35 kg crate is at rest on the floor. A man attempts to push it across the floor by applying a 100 N force horizontally.

(a) Take the coefficient of static friction between the crate and the floor to be 0.37 and show that the crate does not move.

(b) A second man helps by pulling up on the crate. Calculate the minimum vertical force he must apply so that the crate starts to move across the floor.

(c) If the second man applies a horizontal rather than a vertical force, what minimum force, in addition to the 100 N force of the first man, must he exert to get the crate started.

Thank you!

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