Work done — task. Physics CBSE Live product, Class 9 (2026-27).

Choose the correct answer:

1. Work done becomes zero when:

Force increases
Speed becomes high
Displacement is zero
Temperature decreases

2. Which of the following is an example of zero work done?

Pulling a suitcase across the floor
Kicking a moving football
Lifting a bucket of water
Pushing a wall that does not move

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