Physics, 02.12.2021 22:40 samgirl2000
A 135 lb plank of length 29.5 ft rests on the ground on one end; the other end rests on a frictionless roller at the top of a wall of height 15.0 ft. The center of gravity of the plank is at its center. The plank remains in equilibrium positioned at any angle equal to or greater than 70.0 degrees with the ground, but slips if the angle is less than 70.0 degrees. Find the coefficient of static friction between the plank and the ground.
Answers: 1
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A 135 lb plank of length 29.5 ft rests on the ground on one end; the other end rests on a frictionle...
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