Question

OR
State Newtons first law of motion and prove it mathematically using second
law of motion.
Give reasons: It is difficult for the fireman to hold the hose pipe which ejects
large amount of water.​

Answer 1

$\bf\large\underline\green{Answer:-}$

➤ Newton's First Law of Motion states that a body will stay at rest or continue its path with constant velocity unless an external force acts upon it. Newton's Second Law of Motion states that the net force that acts upon a body is equal to the mass of the body multiplied by the acceleration due to the net force.

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Answer 2

Answer:

Newton's first law states that a body stays at rest if it is at rest and moves with a constant velocity unit if a net force is applied on it. Newton's second law states that the net force applied on the body is equal to the rate of change in its momentum. That is, when F = 0, v = u for whatever time, t is taken.

When large amount of water is ejected from a hose at a high velocity, according to Newton's Third Law of Motion, water pushes the hose in backward direction with the same force. Therefore, it is difficult for a fireman to hold a hose in which ejects large amount of water at a high velocity.

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