Solve this one?

Question

A 5kg block rests on a 30 deg. incline. The coefficient of static friction between the block and the incline is 0.20 How large a horizontal force must push on the block if the block is to be on the verge of sliding up the incline. i need the solution. thanks.

Answer 1

4 forces are acting on the block

Weight (w)

Friction (F)

Normal to incline (N)

and the horizontal force (A)

If the block moves at constant speed the total force at x and y axes must be zero.

I think now you can solve it...