Which is an example of no work being done?

Type: MCQ • Marks: 1

A. Carrying a bag while walking on level ground at constant velocity

B. Pulling a rope upward

C. Lifting a bag upward

D. Pushing a trolley forward

Explanation

The upward force is perpendicular to horizontal displacement, so no work is done by that force.

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Class 9th Science (MCQ)

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