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प्रश्न
Give reason for the following :
When a hanging carpet is beaten with a stick, the dust particles start coming out of it.
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उत्तर
When a hanging carpet is beaten with a stick, the dust particles come out of it because the force of the stick makes the carpet move to-and-fro slightly but the dust particles tend to remain at rest (or stationary) due to their inertia and hence get separated from the carpet.
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संबंधित प्रश्न
What is the usual name of the forces which cannot produce motion in a body but only change its shape ?
Fill in the following blank with suitable word :
When a stationary car starts suddenly, the passengers are jerked …………………..
Give one example where a force moves a stationary body.
Give one example where a force changes the speed of a moving body.
What do you understand by the terms “balanced forces” and “unbalanced forces” ? Explain with examples.
What happens to the passengers travelling in a bus when the bus takes a sharp turn ? Give reasons for your answer.
There are two types of forces X and Y. The forces belonging to type X can produce motion in a stationary object but cannot change the shape of the object. On the other hand, forces belonging to type Y cannot produce motion in a stationary object but can change the object. What is the general name of the forces as (a) X, and (b) Y?
What is the unit of force ?
A boy of mass 50 kg standing on ground exerts a force of 500 N on the ground. The force exerted by the ground on the boy will be :
Why does it happen?
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
