A rope is tied on a crate and makes a. 60 deg b. 30 deg with the ground .On what angle be able to move the crate with less force?

Answer 1

This is trickier than it looks.

Required force F in rope is given by:

(M*g - F sinA)*mu_s = F cos A

F*(cos A + mu_s* sinA) = M*g

For values of the static friction coefficient (mu_s) that are less than 1, F will be less for A = 30 degrees.