forces (bbc)

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Forces occur when there is an interaction between two objects. These forces always happen in pairs – when one object exerts a force on another, it always experiences a force in return.

The green arrow shows the force on the weights as the weightlifter pushes upwards.

The red arrow shows the downwards force on the weightlifter’s arm muscles.

These two forces are an interaction pair. They are equal…

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Amylouise71

amazing

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