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प्रश्न
Select the correct alternative.
Friction is increased if
पर्याय
an oil is sprayed
the surfaces are made wet
the surfaces are made dry
the surfaces are polished
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उत्तर
the surfaces are made dry
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संबंधित प्रश्न
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Select the correct alternative.
A body falls downwards because of
Give one example of force as a push
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Fill in the blank.
Magnetic force is a ................ force.
Match the following.
| Column A | Column B |
| 1. Non-contact forces | a. perpendicular to surface |
| 2. Catapult | b. an act of push or pull |
| 3. Force | c. unit of force |
| 4. Normal force | d. action-at-a-distance forces |
| 5. Newton | e. contact force |
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
______ is an ancient Indian astronomer.
A truck of mass M is moved under a force F. If the truck is then loaded with an object equal to the mass of the truck and the driving force is halved, then how does the acceleration change?
