A 1300-N crate rests on the floor. How much work is requred to move it at constant speed…?
A 1300-N crate rests on the floor. How much work is required to move it at a constant speed (a) 4.0 m along the floor against a friction force of 230 N, and (b) 4.0 m vertically? I’m unsure how to approach this problem, and I would greatly appreciate a step-by-step explanation so that I can understand how to tackle similar questions in the future. Thank you!
2 Answers
part a)
Since the problem states constant speed, the acceleration is zero. The frictional force and the force exerted on the crate by the mover are the forces acting on the crate. The work then is only
W = F*d = 230N*4m = 920 J
part b)
Similar to the above except vertical. The force needed to lift the crate at constant speed vertically is 1300 N. Therefore
W = F*d = 1300N*4m = 5200J
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