A man pushes a crate with a force of 550N to the right and does 2.2kg of work.
A. Through what distance does he push the crate?
B. The box does not speed up or slow down during this time.
C. What happens to the energy transfered by the man.
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work cant be represented by using ''kg'' unit of work is J
soln : F = 550 N , W = 2.2J , ∅= 0
A) W = FS cos ∅ => 2.2/550 = S [°•° the man is pushing to his right the direction of force is similar to the direction of displacement so ∅ = 1 and •°• cos 0 = 1 ]
=> S = .004
•°• S = .004m
B). cant understand that 2 do
C) the energy given by the man is used up
in :
- producing sound
- producing heat
- moving the crate through a distance
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