Push, pull and move
Compare forces, mass, inertia and the paired pushes between objects.
Choose any question to begin.
- 1
Can balanced forces act on a moving object?
Pull one trolley with two helpers against one, then with equal teams. Does balancing the pulls stop a rolling trolley?
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How do force and mass change acceleration?
Can the same push move a heavier cart as easily? Keep the push the same and compare a light cart with a heavy one. Watch the speed gained in the same four seconds.
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Why does a moving object not always need another push?
What makes a rolling cart slow down? Compare the same starting speed with and without a resisting force. Inertia is not another forward push.
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What sets the stopping distance of a sliding object?
Which change makes the block stop sooner? Keep the starting speed the same and compare weaker and stronger friction. Then try a faster start.
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Why can equal pushes produce different motions?
Why do two carts move apart at different speeds? A brief push gives both carts equal and opposite impulses. After the push, watch them coast.
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Each discovery includes all five reading levels. Journey progress reflects the checkpoints answered on this browser.