Two siblings are in a funny mood and push each other away with a force of 20 N. If sibling 1 has a mass of 50 kg and sibling 2 a mass of 60 kg, what will be the ratio between their respective accelerations (sibling 1 : sibling 2)? (2 significant figures)

Explanation:

Newton's second law states the the net force exerted over a body, , is proportional to the product of its mass, ,   and its acceleration,   :

As a consequence of Newton's third law, action and reaction forces are equal in magnitude and opposite in direction. Hence, 20 N is the same magnitude of the forces over each sibling.

1. Sibling 1:

2. Sibling 2:

3. Ratio sibling 1: sibling 2:

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