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प्रश्न
When a rubber balloon held between the hands is pressed, its shape changes. This happens because :
विकल्प
balanced forces act on the balloon
unbalanced forces act on the balloon
frictional forces act on the balloon
gravitational forces act o the balloon
उत्तर
balanced forces act on the balloon.
Balanced forces are responsible for bringing about a change in the shape of an object.
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संबंधित प्रश्न
State whether force is a scalar or a vector quantity?
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.
State the various effects of force.
Give one example where a force moves a stationary body.
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 :
The SI unit of force is ______.
Why does it happen?
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
