Question

Which of the following shows inertia of state of rest? 1)The mud on the wheel of a car flies on the mudguard. 2)To shake the dust on the mat. 3)A fan keeps on revoking for a while, even if the switch is turned off. 4)Train stops suddenly when brakes are applied. And explain why?

Answer 1

Answer:

to shake dust on the mat

Answer 2

Answer :

2) To shake the dust on the mat .

Explanation :

• Inertia : Inertia is a property of a body by virtue of which it opposes any object to change its state, i.e., If a body is on rest it remains on rest and if a body is on motion it remains on motion until or unless any external force is applied .
• So, here the inertia of the dust on the mat is on rest and when the mat is beaten the mat becomes on motion but the dust is remain on rest position .
• So, when the mat is beaten, the dust particles get separated from the mat .