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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
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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
An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason.
What is the usual name of the forces which cannot produce motion in a body but only change its shape ?
Which of the two, balanced forces or unbalanced forces, can change the shape of an object ? Give an example to illustrate your answer.
Give one example where a force changes the speed of a moving body.
Give one example where a force changes the direction of a moving body.
What do you understand by the terms “balanced forces” and “unbalanced forces” ? Explain with examples.
What type of forces – balanced or unbalanced – act on a rubber ball when we press it between our hands ? What effect is produced in the ball ?
Why are road accidents at high speeds very much worse than road accidents at low speeds ?
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 ?
Which of the following effect cannot be produced by an unbalanced force acting on a body?
