1. if μs is static coefficent, it wont help here, you need μk
work= μk*20*g*3
2. work=mgh
here, mg=400 lbs
work=400*30 ft-lbs
I need help with these two.
1. A horizontal force pulls a 20-kg box across the floor with constant speed. μs is 0.60, how much work does F do in moving the cart 3.0 m?
2. A 400 lb load of bricks is to be lifted to the top of a scaffold 30 feet high. How much work to lift it?
1 answer