A 52-kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 27.9° the crate begins to slide downward.

(a) What is the coefficient of static friction between the crate and the ramp?
(b) At what angle does the crate begin to slide if its mass is doubled?

Question

A 52-kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 27.9° the crate begins to slide downward.

(a) What is the coefficient of static friction between the crate and the ramp?
(b) At what angle does the crate begin to slide if its mass is doubled?

anonymous · Answer

tg alpha (angle) = static friction tg 27,9 = 0,529 ~ 0,53
and for B i dont have time sorry...