1. The problem statement, all variables and given/known data A worker pushes a crate weighing 93 N up an inclined plane. The worker pushes the crate horizontally, parallel to the ground. a. The worker exerts a force of 85 N, how much work does he do? (A: 340 J) b. How much work is done by gravity? (A: -280 J) c. The coefficient of friction is 0.20. How much work is done by friction? 2. Relevant equations W=Fd 3. The attempt at a solution W=Fd W= (mu*Fnormal)d I'm completely stuck, as I don't know how to find the normal force! Thank you in advance!