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प्रश्न
Fill in the blank.
On pulling a string, its .................. increases.
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उत्तर
On pulling a string, its length increases.
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संबंधित प्रश्न
In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in case.
Squeezing a piece of lemon between the fingers to extract its juice.
In the following situation identify the agent exerting the force and the object on which it acts. State the effect of the force in case.
A load suspended from a spring while its other end is on a hook fixed to a wall.
In the following situation identify the agent exerting the force and the object on which it acts. State the effect of the force in case.
An athlete making a high jump to clear the bar at a certain height.
Match the following columns
| Column A | Column B |
| a) Non contact force | 1) repel |
| b) Like poles | 2) kg |
| c) Contact force | 3) gravitational force |
| d) Mass | 4) wear and tear |
| e) Weight | 5) force of friction |
| f) Friction | 6) kgf |
Give one example of force as a pull
What do you mean by the gravitational force? Give an example to illustrate it.
Answer the following in short.
Why is magnetic force considered as an action-at-a-distance force?
Match the following.
| Column A | Column B |
| 1. Rolling friction | a. making grooved designs |
| 2. Static friction | b. regular oiling |
| 3. Reducing friction | c. a book placed on a tabletop |
| 4. Increasing Friction | d. wheels of a car |
Can you identify whether it is push or pull that results in motion in the following cases?
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| Push / Pull | Push / Pull | Push / Pull |
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| Push / Pull | Push / Pull | Push / Pull |
A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to






