PHYSICS HOMEWORK! please help

Posted on 2013-12-03 13:25:00 in Physics by SARAH

Ive been trying to figure this problem out for a while now and i just can't find any solution. i need help please help me! i would extremely appreciate it!



A dock worker loading crates on a ship finds that a 20 kg crate, initially at rest on a horizontal surface, requires a 89 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 47 N is required to keep it moving with a constant speed. The acceleration of gravity is 9.8m/s2.

Find the coefficient of static friction be-tween crate and floor.

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