# physics

posted by
**Jessi**
.

A block sits against a vertical wall and a 120 lb force P acts diagonally to the left on the block at an angle below the horizontal. Determine the magnitude and direction of the friction force which the vertical wall exerts on the 100 lb block if theta is (a)15 degrees (b)30 degrees

For part a I got that the answer is 46.36 lb up but I can't get part b to work correctly.