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प्रश्न
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.
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उत्तर
The body gets extra force due to the runner's running (speed). Due to this, he can lift his body to the required height. So, here, the person is forced due to his speed. Force is being applied to the person's own body, and due to this force, the person can lift his body.
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संबंधित प्रश्न
To move a loaded trolley we have to ______ it.
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 |
Select the correct alternative.
Friction is increased if
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State if the following statement is true or false. Correct the statement if it is false.
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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 |
Solve the crossword puzzle.
Across
1. Type of force which depends upon the roughness of a surface
2. An effect of friction
3. The force of friction caused due to fluids
4. Type of friction acting between two bodies at rest
5. Type of friction which occurs when applied force overcomes static friction
6. A special body design to enable minimum drage Down
Answer the following in detail.
Differentiate between contract and non-contract force. Support your answer with suitable examples.
______ is an ancient Indian astronomer.
