Ages 9–10🔬 Science27 verified questions on this shelf

Levers, Pulleys & Gears

Recognise that some mechanisms including levers, pulleys, and gears allow a smaller force to have a greater effect

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Question 1 of 3

A child wants to lift an 8‑kg toolbox using a 1.2‑m long wooden rod as a lever. The child places the fulcrum 0.3 m from the toolbox (the load side) and pushes down on the opposite end. What minimum force must the child apply to just start lifting the toolbox? (Take g = 10 m/s².)

Question 2 of 3

A child places a heavy backpack on one end of a seesaw and pushes down on the opposite end, causing the backpack to rise. Which mechanism is the seesaw using to allow the child’s smaller effort to lift the heavier backpack?

Question 3 of 3

Sam wants to lift a heavy bucket of water by pulling on a rope that runs over a wheel fixed to the ceiling. Which mechanism is Sam using?

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Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.