Per NCERT, what does NEGATIVE work done mean?
ANegative work cannot exist physically
BThe force is small
CThe displacement is short
DThe displacement is OPPOSITE to the applied force (e.g. a goalkeeper stopping a moving football — force opposite to ball's motion)
Answer & Solution
Correct answer: D. The displacement is OPPOSITE to the applied force (e.g. a goalkeeper stopping a moving football — force opposite to ball's motion)
Per NCERT §7.1.2, negative work = force opposite to displacement direction. The other options misstate.
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