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Question
When a carpet is beaten with a stick, dust comes out of it. Explain.
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Solution
- The inertia of an object tends to resist any change in its state of rest or state of motion.
- When a carpet is beaten with a stick, then the carpet comes into motion. But the dust particles try to resist their state of rest.
- According to Newton’s first law of motion, the dust particles stay in a state of rest while the carpet moves. Hence, the dust particles come out of the carpet.
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'When a hanging carpet is beaten with a stick, the dust particles start coming out of it'. This phenomenon can be best explained by making use of :
The amount of inertia of a body depends on its _________.
Give two examples of the following:
Inertia of rest
Match the following
| Column I | Column II |
| Newton’s I law | propulsion of a rocket |
| Newton’s II law | Stable equilibrium of a body |
| Newton’s III law | Law of force |
| Law of conservation of linear momentum | Flying nature of bird |
Classify the types of force based on their application.
An insect is at the bottom of a hemispherical ditch of radius 1 m. It crawls up the ditch but starts slipping after it is at height h from the bottom. If the coefficient of friction between the ground and the insect is 0.75, then h is ______. (g = 10 ms−2)
