A wheel and axle with a groove on the outside isAa pulleyBa wheel and axleCa leverDcompound machine
Question
A wheel and axle with a groove on the outside isAa pulleyBa wheel and axleCa leverDcompound machine
Solution
The correct answer is A, a pulley. A pulley is a wheel and axle with a groove on the outside where a rope, belt, or chain can run. This simple machine changes the direction of the force, making it easier to lift things.
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