Question

Match the following:

List 1	List 2
A	A dusting of a carpet	1	Inertia of direction
B	Vehicles are provided with a mudguard	2	Inertia of motion
C	Fan continues to rotate after switching off	3	Measure of inertia
D	mass	4	Inertia of rest

A. A-(4); B-(1); C-(3); D-(2)
B. A-(4); B-(1); C-(2); D-(3)
C. A- (4); B-(2); C-(1); D-(3)
D. A-(1); B-(4); C-(2); D-(3)

Answer 1

Hint: Because of the inertia property of the body it will try to stay in the same state as it was before. While dusting the carpet, dust will not move with the carpet mud will be thrown off from rotating wheels in a tangential direction if there is not enough centripetal force. The fan wants to continue its state of motion even after switching it off the inertia of a body is measured by the amount of matter present in it.

Complete step by step answer:
The inertia the resistance offered by the body to any change in states since the state of the body can be changed in many ways, different types of inertia are associated with the body the state of the body can be changed by changing its direction of motion and changing its velocity if body is in motion the corresponding inertia are called as inertia of direction and inertia of motion respectively. If a body is at rest and we apply force to change its state then the resistance offered by the body is called as inertia of rest. The inertia or resistance offered by the body to external forces depends on the amount of matter present in it. Amount present is nothing but the mass of the body, therefore, the body is a measure of its inertia.
A) When we beat the hanging carpet with a stick or rod the carpet moves back and forth. Since the dust particles are on the carpet due to inertia of rest (as initially they were at rest) they will not move with the carpet and hence dust can be easily removed.
B) When vehicles move on a muddy road, mud will stick to the wheels of the vehicle due to force of adhesion. While moving wheel rotates and mud will remains sticks if there is enough centripetal force acting on mud to keep it rotating with wheel if centripetal force is not enough to keep it in rotation, due to centripetal force mud will be thrown in the direction tangential to its direction of motion thus flying of mud is related to its inertia of direction and to avoid vehicle to get dirty mud grounds ore. mud grounds ore is provided with the vehicle.
C) when fan is rotating it is in a motion (circular motion performed by fins) when switch off the fan, fan wants to remain in rotating state due to inertia of motion hence fan will continue to rotate after switching off.
D) As we have already discussed amount matter, i.e. mass is a measure of inertia.

Therefore option (A) is the correct option.

Note:
If the sun disappears suddenly due to inertia of direction of the earth it will fly off in a tangential direction, the inertia not a force, it is just if you throw a ball on a surface and if there is friction then the ball will continue its motion forever.