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12. Friction
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Q64 of 100 Page 231

Explain why, a speedboat has a streamlined shape.

A speedboat has a streamlined shape so as to reduce the fluid friction as it moves in the waters.


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62

Explain with the help of diagrams, how the use of oil reduces friction between two surfaces in contact with each other.

63

Why are cars, aeroplanes and rockets streamlined ?

65

What are fluids? Name two common fluids.

66

Define friction. What are the factors affecting friction? Explain with examples.

Questions · 100
12. Friction
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