Pete slides a crate up a ramp at an angle of 25◦ by exerting a 290 N force parallel to the ramp. The crate moves at a constant speed. The coefficient of friction is 0.28.

Question

Pete slides a crate up a ramp at an angle of 25◦ by exerting a 290 N force parallel to the ramp. The crate moves at a constant speed. The coefficient of friction is 0.28. 
How much work did Pete do when the crate was raised a vertical distance of 2.24 m? 
Answer in units of J

Henry · Accepted Answer

d = 2.24m/sin25 = 5.30 m Parallel to the ramp. Work = Fex * d = 290 * 5.30 = 153t J.