The frictional force exerted by fluids is called
A) rolling friction
B) sliding friction
C) drag
D) normal force
1 Answers
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Explain the concept of frictional force.
1. Whenever the surface of one body slides over another, each body exerts a certain amount of force on other body. 2. These forces are tangential to the surfaces. The force...
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The force exerted by the earth on a ball is 8N. The force on the earth by the ball is
Correct option is B) 8N
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The force exerted by the earth on a ball is 8N. The force on the earth by the ball is
2 Answers
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Pressure = ………… A) Force B) Force x area C) Area / force D) Force / area
D) Force / area
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Choose correct matching option: Group – A 1. Gravitational force 2. Frictional force
A) 1 – c, 2 – d, 3 – e, 4 – b, 5 – a
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……………. and ……………. are called fluids. A) Liquids, gases
A) Liquids, gases
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To prove that the frictional force is independent of the area of contact, the required materials and apparatus are
B) spring balance, brick, thread
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You wanted to know effect of roughness on frictional force. Which of the following material is not needed for your experiment?
C) Stop watch
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Frictional force on a object in a fluid depends on A) Shape of the object
C) All of the above
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Which of the following is incorrect in the case of friction? A) Frictional force is dependent of the area of contact.
A) Frictional force is dependent of the area of contact.
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