Advertisements
Advertisements
प्रश्न
Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.
Advertisements
उत्तर
Due to the backward reaction of the water being ejected
When a fireman holds a hose, which is ejecting large amounts of water at a high velocity, then a reaction force is exerted on him by the ejecting water in the backward direction. This is because of Newton’s third law of motion. As a result of the backward force, the stability of the fireman decreases. Hence, it is difficult for him to remain stable while holding the hose.
APPEARS IN
संबंधित प्रश्न
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?
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 ?
Fill in the following blanks with suitable words :
Forces in a Newton’s third law pair have equal _____________ but act in opposite _____________.
If action is always equal to reaction, explain why a cart pulled by a horse can be moved.
If a man jumps out from a boat, the boat moves backwards. Why ?
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.
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.
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?
Can action and reaction forces be noncontact forces?
