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प्रश्न
Give one example where a force changes the shape (and size) of a body.
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उत्तर
The shape of kneaded wet clay (geeli mitti) changes when a potter converts it into pots of different shapes and sizes. This happens because the potter applies force on the kneaded wet clay.
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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 running car stops suddenly, the passengers are jerked …………………..
Fill in the following blanks with suitable word :
If there were no unbalanced force of……………….. and no…………………. resistance, a moving bicycle would go on moving for ever.
What do you understand by the terms “balanced forces” and “unbalanced forces” ? Explain with examples.
A car is moving on a level road. If the driver turns off the engine of the car, the car’s speed decreases gradually and ultimately it comes to a stop. A student says that two forces act on the car which bring it to a stop. What could these forces be ? Which of these two forces contributes more to slow down and stop the car ?
A 1000 kg vehicle moving with a speed of 20 m/s is brought to rest in a distance of 50 metres :
(i) Find the acceleration.
(ii) Calculate the unbalanced force acting on the vehicle.
Give one example where a force stops a moving body .
When we talk of a force acting on a body, it usually means :
If we release a magnet held in our hand, it falls to the ground. The force which makes the magnet fall down is an example of :
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to :
