Question

(a) State Newton's third law of motion and give two examples to illustrate the law.
(b) 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.

Answer 1

Answer:

each action same The opposite reaction

Answer 2

$\huge\bf{\underline\pink{Question}}$

(a) State Newton's third law of motion and give two examples to illustrate the law.

(b) 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.

$\huge\bf{\underline\red{Answer}}$

(a) Newton’s third law of motion:-

➡️ According to the 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. In other words, to every action, there is an equal and opposite reaction.

➡️ Newton's third law is useful for figuring out which forces are external to a system.

For example:-

➡️ When we jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.

➡️ When we want to move forward on a boat, you paddle by pushing the water backwards, causing you to move forward.

(b) When a fireman directs a powerful stream of water on a fire,the hose pipe tends to go backward due to the reaction force of the water rushing through it in the forward direction at a great speed.

When a fireman directs a powerful stream of water on fire from a hose pipe, he has to hold the hose pipe strongly because of its tendency to go backwards.