Question

5 marks question

CBSE board

class 9th

What is inertia? explain it

Answer 1

ANSWER

it is the tendency of a body to oppose any change in its state of uniform motion or rest is known as inertia .


it is inherent property of all object



$\sf{there \: are \: 3 \: types \: of \: inertia}$


$\sf{1. \: inertia \: of \: rest}$ 
the tendency of. body to oppose any. change in its state of rest is called inertia of rest.

$\sf{2. \: inertia \: of \: motion}$
the tendency of. body to oppose. any change in its state of uniform motion is known as inertia of motion.



$\sf{3.inertia \: of \: direction}$

the tendency of. body to oppose any change in its direction is known as inertia of direction ..

its law is

any body remains is in rest remains in rest or is in motion remains in motion until or unless any external force act on it

Thanks

Answer 2

$\sf{\huge{INERTIA}}$ :

The inability of a body to change its state of rest or of uniform motion along a straight line is called inertia of the body.

Newton's First law is also referred as Law of inertia.

$\sf{\huge{EXAMPLES}}$ :

$\bold{\underline {Based \:on \:inertia \:of rest}}$ :

1 ). When a horse suddenly starts running, the rider falls backward.

2 ). When we shake the branch of a tree, it's fruits and dry leaves fall down.

$\bold{\underline{Based\:on\:inertia \: of \:motion}}$ :

1 ). When a horse running fast suddenly stops, the rider is thrown forward.

2 ). A person getting out of a moving bus or train falls in the forward direction.

$\bold{\underline {Based\:on\: inertia \:of\:direction}}$ :

1 ). Due to sharpening of a knife, the sparks coming from the grind stone fly off tangentially to the rim of the rotating stone. This is due to inertia of direction.

2 ). When a vehicle moves, the mud sticking to its wheels flies off tangentially.