Q. 265.0( 1 Vote )
Why fireman finds it difficult to hold a hose, which ejects large amounts of water at a high speed?
Answer :
It is difficult for a fireman to hold a hose which ejects large amount of water at high velocity because according to third law of Newton which states that for every action there is an equal and opposite reaction.
As the hose ejects a large amount of water in the forward direction has great force. So an equal and opposite reaction is applied on the fireman. That is why he finds it difficult to hold the hose. Also according to law of conservation of momentum, the amount (mass) of water coming out (velocity) produces recoil on the hose. To stop the hose from moving, the fireman has to supply his own force on the hose, and must exert a large quantity of force to counter the hose's recoil.
Rate this question :
Quiz | Conservation of Momentum33 mins
Foundation | How to Calculate Tension Force (Part-1)43 mins
What is Impulse?44 mins
Lakhmir Singh | Force and Laws of Motion Part-347 mins
Newton's First Law of Motion48 mins
Newton's first law and Inertia34 mins
Lets solve the Numericals46 mins
Lakhmir Singh | Force and Laws of motion Part-232 mins
Lets understand Circular Motion42 mins
Lakhmir Singh | Force and Laws of Motion Part 142 mins
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to:
A. Exert larger force on the ball
B. Reduce the force exerted by the ball
C. Increase the rate of change of momentum
D. Keep the ball in hands firmly
Lakhmir Singh & Manjit Kaur - PhysicsThe rocket work on the principle of conservation of:
A. Mass B. Energy
C. Momentum D. Velocity
Lakhmir Singh & Manjit Kaur - PhysicsGive reasons for the following:
(a) A ball thrown upwards in a running train returns back to the hands.
(b) When a person moves out of a boat, it moves backward.
Together with ScienceWhy fireman finds it difficult to hold a hose, which ejects large amounts of water at a high speed?
Evergreen - ScienceState and prove the law of conservation of linear momentum.
Together with Science