work is done by the pulling force which is same as the tension force in the rope. the net work done is zero for the crate since crate moves at constant velocity. but there is work done by the tension force which is equal in magnitude to the work done by the frictional force.
T = tension force in the rope = 115 N
d = displacement of the crate = 7.0 m
θ = angle between the direction of tension force and displacement = 37 deg
work done on the crate is given as
W = F d Cosθ
inserting the values given above
W = (115) (7.0) Cos37
W = 643 J
The work done in pulling the crate to the given distance is 642.9 J.
The work done in pulling the crate is determined from the product of applied force and displacement of the crate. The work done is calculated as follows;
W = Fdcos(θ)
where;
F is the applied force
d is the displacement
W = 115 x 7 x cos(37)
W = 642.9 J
Thus, the work done in pulling the crate to the given distance is 642.9 J.
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