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प्रश्न
Comment on the statement ‘rest and motion are relative terms’. Give an example.
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उत्तर
Explanation:
- Rest: An object is said to be at rest if it does not change its position relative to the observer.
- Motion: An object is in motion if it changes its position relative to the observer.
Example:
A person sitting inside a moving train:
At rest with respect to other passengers and the train because their relative position does not change. In motion with respect to an observer standing outside the train because their position changes relative to the surroundings outside the train.
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संबंधित प्रश्न
Give two examples of bodies having non-uniform motion.
When a car runs on a circular track with a uniform speed, its velocity is said to be changing. This is because ______.
In the speed-time graph for a moving object shown here, the part which indicates uniform deceleration of the object is :
Gita travels with her father in a bike to her uncle’s house which is 40 km away from her home. She takes 40 minutes to reach there.
Statement 1: She travels at a speed of 1 km/minute.
Statement 2: She travels at a speed of 1 km/hour.
Match the Following.
| Sr. No. | List I | List II | |
| 1. | Motion of a body covering equal distances in equal interval of time | A. |  |
| 2. | Motion with non uniform acceleration | B. |  |
| 3. | Constant retardation | C. |  |
| 4. | Uniform acceleration | D. |  |
Given below as figure is the distance-time graph of the motion an object.
- What will be the position of the object at 20s?
- What will be the distance travelled by the object in 12s?
- What is the average speed of the object?
Motion of an object or a part of it around a fixed point is known as ______ motion.
A body repeating its motion after certain interval of time is in ______ motion.
If a body does not change its position, then it is said to be at ______.
Time is a vector quantity.
