The work done by the crate will be 480 Nm(J). if the body is displaced in the same direction of the force it will be positive.
Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.
Work may be zero, positive, and negative.it depends on the direction of the body displaced.
The total displacement travelled by the body;
d=v×t
d=4 m/sec ×6 sec
d= 24 m
The work done is found as;
W=FS
W=20 N × 24 m
W=480 Nm(J)
Hence,the work done by the crate will be 480 Nm(J).
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