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प्रश्न
State Newton’s third law of motion and give two examples to illustrate the law.
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उत्तर
According to Newton’s third law of motion, whenever one body exerts a force on another body, the second body exerts an equal and opposite force on the first body.
Examples:
(i) Jet airplanes utilize the principle of action and reaction. In the modern jet aircraft, the hot gases obtained by the rapid burning of fuel rush out of a jet from the rear end of the aircraft at a great speed. The equal and opposite reaction of the backward-heading gases pushes the aircraft forward at a great speed.
(ii) While rowing a boat, the boatman pushes the water backwards with the oars. The water exerts an equal and opposite push on the boat which makes the boat move forward. In fact, harder the boatman pushes back the water with the oars, greater is the reaction force exerted by water and faster moves the boat, in forward direction.
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संबंधित प्रश्न
If action is always equal to reaction, explain why a cart pulled by a horse can be moved.
Why is it difficult to walk on a slippery road ?
Explain why, a runner presses the ground with his feet before he starts his run.
Name the law involved in the following situation :
when person A standing on roller skates pushes another person B (also standing on roller skates) and makes him move to the right side, then the person A himself gets moved to the left side by an equal distance.
Explain why, when a fireman directs a powerful stream of water on a fire from a hose pipe, the hose pipe tends to go backward.
According to the third law of motion, action and reaction :
Give a scientific reason.
Even though the magnitudes of action force and reaction forces are equal and their directions are opposite, their effects do not get cancelled.
According to the third law of motion, action and reaction
In a hose pipe ejecting water, what is the reaction force?
A book is resting on a table. Which of the following is the correct reaction force to the gravitational pull of the Earth on the book?
