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Earn 100

Does friction oppose motion of an object?

Important Questions on Force and Pressure

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Science>Physics>Force and Pressure>Disadvantages of Friction
What is the name of 'special shape' which is given to objects moving through air (or water) to reduce drag?
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Science>Physics>Force and Pressure>Disadvantages of Friction
Explain why, sportsmen use shoes with spikes.
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Science>Physics>Force and Pressure>Disadvantages of Friction
Which of the following does not have a streamlined shape?
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Science>Physics>Force and Pressure>Disadvantages of Friction
Why does a matchstick light when we strike it on a rough surface?
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Science>Physics>Force and Pressure>Disadvantages of Friction
Which parts wear away first in shoes? Give a reason for your answer.
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Science>Physics>Force and Pressure>Disadvantages of Friction
What is meant by 'streamlined shape'? Name an object which usually has a streamlined shape.
 
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Science>Physics>Force and Pressure>Disadvantages of Friction
Why are treads made in the surface of tyres?
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Science>Physics>Force and Pressure>Disadvantages of Friction

Friction can also produce?

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Science>Physics>Force and Pressure>Disadvantages of Friction
Explain why, wheels are so useful.
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Science>Physics>Force and Pressure>Disadvantages of Friction
Four similar cars having exactly the same mass are running at the same speed on the same road when brakes are applied at the same time. The cars come to a stop after covering distances of 5 m, 5.5 m, 4.8 m and 5.2 m respectively. The friction between the brake pads and discs will be the maximum in the car which travels the distance of:
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Science>Physics>Force and Pressure>Disadvantages of Friction
Why are cars, aeroplanes and rockets streamlined?
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Science>Physics>Force and Pressure>Disadvantages of Friction
Why do brake pads of bicycles have to be replaced quite often?
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Science>Physics>Force and Pressure>Disadvantages of Friction
Which of the following is not an advantage of friction?
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Science>Physics>Force and Pressure>Disadvantages of Friction
Car wheels often spin on icy roads. Explain why.
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Science>Physics>Force and Pressure>Disadvantages of Friction
Which of the following statement is not true?
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Science>Physics>Force and Pressure>Disadvantages of Friction
Explain why, a speedboat has a streamlined shape.
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Science>Physics>Force and Pressure>Disadvantages of Friction
Cotyledons are also called-
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Science>Physics>Force and Pressure>Disadvantages of Friction

When objects move through fluids, they have to overcome friction acting on them by:

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Science>Physics>Force and Pressure>Disadvantages of Friction
A body shape which offers very little resistance to the flow of air (or water) around it is called:
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Science>Physics>Force and Pressure>Disadvantages of Friction
State two advantages and two disadvantages of friction.