In which case, work done will be zero: - Vidyadip

MCQ

In which case, work done will be zero:

A
A weight$-$lifter while holding a weight of $100\ kg$ on his shoulders for $1$min.
B
A locomotive against gravity when it is running on a level plane with a speed of $60\ kmh^{-1}$.
C
A person holding a suitcase on his head and standing at a bus terminal All of the above.
✓
All of the above.

✓

Answer

Correct option: D.

All of the above.

Work done by weight$-$lifter is zero because there is no displacement.
In a locomotive, work done is zero because force and displacement are mutually perpendicular to each other.
While a person holding a suitcase, work done is zero because there is no displacement.

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