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Earn 100

Explain the physics behind a person walking on the road.

Important Questions on Newton's Laws of Motion

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Action and reaction force acts on:
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According to third law of motion, action and reaction:
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“Forces always occur in pair.” From which law, do we conclude the above statement. Give two examples to support your answer.

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Explain why a fireman holds the hose pipe very tightly when he directs a powerful stream of water on fire.  
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Explain why it is difficult for a fireman to hold a hose, which ejects large amounts of water at high velocity?

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State the action and reaction in the following:

Moving rocket

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Why is it difficult to walk on slippery road?

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A man is lying down on a soft bed, which has sagged under his weight. Which of the following statements is correct?
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Which of these is an example of Newton's third law of motion?
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If the earth attracts a body with a force of 20 N, then what force is exerted on the earth by the body?

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A water sprinkler used to irrigate grass lawns begins to rotate as soon as the water is supplied. Explain the principle on which it works.  
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If someone jumps to the shore from a boat, the boat moves in opposite directions. Explain why.
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Body A collides with a body B. A exerts a force of 10 N on B. The force which B exerts on A is _____ N.

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Any two forces which are equal and opposite form an action-reaction pair.

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“Action and reaction are equal and opposite, still their resultant is not zero.” Explain.

HARD
If action is always equal to reaction, explain how a horse can pull a cart?
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A boy is standing on a horizontal surface wearing skates. What will the boy experience if he pushes the wall?

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If the mouth of an inflated balloon is untied, what will you observe? Explain your observation.

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According to the Newton's third law of motion:
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A forward force on the bullet and recoil of the gun is an example of?