In this free-body diagram, the weight (W) and normal force (n) have equal magnitudes. The magnitudes of any forward or backward forces, however, are not determined. The free-body diagram will not apply to which of these objects or persons?
a. an automobile accelerating on a flat highway
b. a box sliding across a table at constant speed
c. a woman jumping off the floor
d. a box at rest on a table
b. a woman jumping off the floor
the jumping woman tend to exert more force on the ground.
so its c right ?
c is the right answer.
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