Which of the following is used to reduce friction :
1. Streamlines
2. Use of ball bearings
3. Lubrication

1 & 2 only

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1 & 3 only

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2 & 3 only

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1, 2 & 3

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Solution

The correct option is D 1, 2 & 3
All the mentioned option are correct.
Streamlines reduces the friction in fluid.
Use of ball bearing reduces the friction in machines rotating parts.
Lubricants are used in machines and moving parts to reduce friction.

Option D is correct.

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Similar questions

Q. Choose the correct statement from the following:

1. Grease is used to reduce friction in the bicycle chain.
2. Ball bearings are used to reduce friction in a fan.
3. Oil is used to increase friction in car parts.
4. Talcum powder is used to reduce friction on a carrom board.

Q. Which of the following should be used to reduce friction on a carrom board?
(a) a lubricating oil
(b) a dry lubricant
(c) a layer of grease
(d) a ball bearing

Of the following statements choose the correct statement :
A) Grease is used to reduce friction in the bicycle chain.
B) Ball bearings are used to reduce friction in a fan.
C) Oil can be used to increase friction in a car engine.
D) Talc can be used to reduce friction in a carrom board.

Q. Friction can be increased by
(a) using ball bearings between the two surfaces.
(b) making the surfaces rough.
(c) lubricating the surfaces.
(d) using streamlined shapes.

Q. Ball-bearings are used to reduce the friction by.

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Which of the following is used to reduce friction :1. Streamlines2. Use of ball bearings3. Lubrication

The correct option is D 1, 2 & 3All the mentioned option are correct.Streamlines reduces the friction in fluid.Use of ball bearing reduces the friction in machines rotating parts.Lubricants are used in machines and moving parts to reduce friction.Option D is correct.

Which of the following is used to reduce friction :
1. Streamlines
2. Use of ball bearings
3. Lubrication

The correct option is D 1, 2 & 3
All the mentioned option are correct.
Streamlines reduces the friction in fluid.
Use of ball bearing reduces the friction in machines rotating parts.
Lubricants are used in machines and moving parts to reduce friction.

Option D is correct.