Per NCERT, when you push against a rigid wall with all your strength, how much work do you scientifically do on the wall — even though you feel tired?
AZero work, since the wall does not move (s = 0) — tiredness comes from internal muscular contractions, not work on the wall
BNegative work
CLots of work — proportional to your tiredness
DInfinite work
Answer & Solution
Correct answer: A. Zero work, since the wall does not move (s = 0) — tiredness comes from internal muscular contractions, not work on the wall
Per NCERT §7.1.1 Fig 7.5, pushing an immovable wall = zero work scientifically. Tiredness is internal energy expenditure, not external work.
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