Which does more work: lifting a 2 N book 1 m up, or lifting a 2 N book 3 m up?
ALifting it 1 m
BLifting it 3 m
CBoth do equal work
DNeither does work
Answer & Solution
Correct answer: B. Lifting it 3 m
The force is the same, so the longer lift of 3 m gives 6 J, more than 2 J.
Keep practising Force, work and energy
Browse all Force, work and energy questions for Olympiad (Class 4), or explore more Science topics.
Related questions
Water at a hydro dam makes electricity. Where did the water's energy first come from?A magnet pulls a nail towards it. A force like this can act in which way?Wind, rain and storms on Earth are driven by energy from which body?A ball thrown up stops for a moment at its highest point. Which energy is greatest there?A ball is thrown up. What happens to its speed as it rises?Meena uses a short steep ramp and Ali uses a long gentle ramp to lift a barrel onto a trucA girl eats lunch and then runs. Which energy change happens in her body?A solar panel changes sunlight into which energy that can run a fan?