4. Give reason why:
A) when a carpet is beaten with a stick, dost come out of it.
B) why do you fall in the forward direction when a moving bus brakes to a stop
and fall backwards when it accelerates from rest?
Answers
Answer:
a)When a carpet is beaten with a stick, the dust comes out of it because of law of inertia.
Initially the dust particles are at rest along with the carpet. Beating the carpet with the stick makes the carpet to move but the dust particles remain at rest due to inertia at rest, thus the dust gets detached from the carpet.
b)When the bus accelerates from rest, the lower part of our body comes into motion alongwith the bus while the upper part of body tends to remain at rest due to inertia of rest. Therefore, we fall backwards.
hope it will help u
Answer:
a)due to inertia of rest .The dust particles are settled on the carpet when we hit carpet with a stick the carpet moves but due to inertia of rest the dust particles fall down
b)we fall in forward direction when the moving bus comes to stop as our feet come to rest as it is in contact with the bus directly but our whole body tendes to follow the inertia of motion .
we fall backward when bus accelerate as the our feet change its state but the body retain inertia of rest
Explanation:
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