Question

which force act only when they are in contact withthe object?​

Answer 1

Answer:

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Explanation:

Friction forces.

If the motion of the ball has changed then a force must have been exerted on it. The force which opposes motion is called friction. Friction forces always act in the opposite direction to the motion of the object. Friction resists movement when the object and surface are in contact

Answer 2

Answer:

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Frictional Forces

If the motion of the ball has changed then a force must have been exerted on it. The force which opposes motion is called friction. Frictional force always acts in the opposite direction to the motion of the object. Friction resists the movement when the object and surface are in contact with each other.