Advertisements
Advertisements
प्रश्न
Explain why, a runner presses the ground with his feet before he starts his run.
Advertisements
उत्तर
A runner presses the ground with his feet before he starts his run to receive a large reaction force by the ground on which he exerts an action force, in the forward direction. In this way, he can gain a great speed.
APPEARS IN
संबंधित प्रश्न
Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.
Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?
Is the following statement true or false :
A rocket can propel itself in a vacuum.
A girl weighing 25 kg stands on the tloor. She exerts a downward force of 250 N on the floor. What force does the floor exert on her ?
Why does a gunman get a jerk on firing a bullet ?
Do action and reaction act on the same body or different bodies ? How are they related in magnitude and direction ? Are they simultaneous or not ?
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
Why do the action and reaction forces in a pair not cancel each other out?
Can action and reaction forces be noncontact forces?
