Friction [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 7 of 17

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Question 1

Question MCQ▾

Force of friction is defined as:

Choices

Choice (4)Response

a.

Opposing force which comes into play whenever there is relative motion between two bodies.

b.

The area of two surfaces in contact

c.

Friction which comes into play when a body slides over another body

d.

Substances which reduce friction

Edit

Question 2

Question MCQ▾

Friction is a:

Choices

Choice (4)Response

a.

Conservative force

b.

Force

c.

Non-conservative force

d.

None of the above

Edit

Question 3

Question MCQ▾

Fluid friction is also called as:

Choices

Choice (4)Response

a.

Viscous drag

b.

Drag

c.

Both a. and b. are correct

d.

None of the above

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Question 4

Question MCQ▾

Force responsible for wear and tear of machine of various parts is:

Choices

Choice (4)Response

a.

Gravity of earth

b.

Friction

c.

Relative motion

d.

Drag

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Question 5

Question MCQ▾

Spring balance is used to measure the value of:

Choices

Choice (4)Response

a.

Relative motion

b.

Force

c.

Weight of object

d.

Force of friction between the surface and object

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Question 6

Question MCQ▾

The friction which comes into play when a body slides over another body is:

Choices

Choice (4)Response

a.

Rolling Friction

b.

Sliding friction

c.

Treading

d.

Drag

Edit

Question 7

Question MCQ▾

Ball bearings are type of:

Choices

Choice (4)Response

a.

Axle

b.

Treading

c.

Rollers

d.

Wheels

Edit