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ICSE Class 10 Physics Question 19 of 25

Model Paper 1 — Question 8

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8
Question

Question 6(ii)

State whether work is done or not in the following cases, by writing Yes or No :

(a) A man pushes a wall.

(b) A coolie stands with a box on his head for 15 minutes.

(c) A boy climbs up 20 stairs.

Answer

(a) A man pushes a wall. — No
Reason: There is no displacement of the wall, so no work is done.

(b) A coolie stands with a box on his head for 15 minutes. — No
Reason: The coolie is not moving, so there is no displacement.

(c) A boy climbs up 20 stairs. — Yes
Reason: There is displacement in the direction of force (against gravity), so work is done.