1. The problem statement, all variables and given/known data

Find the normal force on an object, 80kg, which is being pulled up by a force of 4000N at an angle of: A) Up at 50 degrees. B) Down at an angle of 70 degrees.

2. Relevant equations

Fw = mg

Fsinx

Fcosx

3. The attempt at a solution

A) Fn = 784 - 4000sin50 = -2280 = 2280N

B) Fn = 784 + 4000sin70 = 4543N

Is this correct?