For work to be done on an object by a force, which condition must be met?
AThe object must be heavy
BThe force must be applied for a long time
CThe object must be DISPLACED in the direction (or component direction) of the applied force
DThe force must produce sound
Answer & Solution
Correct answer: C. The object must be DISPLACED in the direction (or component direction) of the applied force
Work = Force × displacement. If displacement is zero (e.g. pushing against a wall that doesn't move), no work is done — even if the force is huge or sustained. Time and weight aren't directly relevant.
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