Question

A coin placed on a card remains at rest because
1 no unbalanced force acts on it
2 inertia of rest
3 inertia of motion
4 two forces act on a coin which balance each other

Answer 1

4. Two forces act on a coin which balance each other

Answer 2

4 two forces one is Mg that is weight of coin is cancelled out by the force of normal reaction.

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