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प्रश्न
Select the correct alternative.
Friction is increased if
विकल्प
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
An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gap in the following statement using the following terms.
While the arrow moves towards its target, the forces acting on it are due to ______ and that due to ______ of air.
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.
Fill in the blank.
Force is applied as ........... or ..........
Fill in the blank.
On pulling a string, its .................. increases.
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.
A body falls downwards because of
Fill in the blank.
Magnetic force is a ................ force.
Answer the following in short.
Why is magnetic force considered as an action-at-a-distance force?
______ is an ancient Indian astronomer.
In the following figure, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?
