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प्रश्न
State whether the following statement is true or false :
Unbalanced forces acting on a body change its shape.
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उत्तर
False, unbalanced forces acting on a body changes its speed or its direction of motion, but does not change its shape.
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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 …………………..
Give one example where a force stops a moving 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 ?
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?
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.
When a toothpaste tube is squeezed, its shape changes. The force responsible for this is an example of :
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 :
The SI unit of force is ______.
Why does it happen?
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
