A worker pushes a sled with a force of 38.0 N over a level distance of 3.60 m. If a frictional force of 16.0 N acts on the wheelbarrow in a direction opposite to that of the worker, what net work is done on the wheelbarrow?
a. 194 J
b. 137 J
c. 57.6 J
d. 79.2 J
e. 6.11 J
d
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A person pushes horizontally on a heavy box and slides it across the level floor at constant velocity. The person pushes with a 60.0 N force for the first at which time he begins to tire
The force he exerts then starts to decrease linearly from 60.0 N to 0.00 N across the remaining How much total work did the person do on the box? A) 619 J B) 826 J C) 495 J D) 925 J