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प्रश्न
Answer the following in detail.
Differentiate between contract and non-contract force. Support your answer with suitable examples.
उत्तर
| Contract force | Non-contact force | ||
| i) | These are forces that need a physical touch on the object to act upon it. | i) | These are forces that do not need physical contact to act on an object. |
| ii) | These may or may not be natural forces. | ii) | These are natural forces. |
| iii) | They cannot work from a distance. | iii) | They can work from a distance as well. |
| iv) | Its various types are applied to force, normal force, tension, frictional force. | iv) | Its various types are magnetic force, electrostatic force, gravitational force. |
| v) | Example: Player kicking a ball, game of tug-of-war, rolling ball stops, itself, horse pulling a cart, etc. | v) | Example: Magnet attracting iron nails, mango falling from a tree, charged plastic ruler attracts bits of dry-paper, etc. |
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संबंधित प्रश्न
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| 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 |
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1. Type of force which depends upon the roughness of a surface
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5. Type of friction which occurs when applied force overcomes static friction
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| Push / Pull | Push / Pull | Push / Pull |
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| Push / Pull | Push / Pull | Push / Pull |
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