Friction (CBSE Class-8 Science): Questions 1 - 7 of 17

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Question number: 1

» Friction » Force of Friction » What Is Friction

MCQ▾

Question

Force of friction is defined as:

Choices

Choice (4) Response

a.

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

b.

The area of two surfaces in contact

c.

Substances which reduce friction

d.

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

Question number: 2

» Friction » Friction- a Necessary Evil » Processes Related to Friction

MCQ▾

Question

Friction is a:

Choices

Choice (4) Response

a.

Non-conservative force

b.

Conservative force

c.

Force

d.

Question does not provide sufficient data or is vague

Question number: 3

» Friction » Increasing and Reducing Friction » Fluid Friction

MCQ▾

Question

Fluid friction is also called as:

Choices

Choice (4) Response

a.

Viscous drag

b.

Drag

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question number: 4

» Friction » Friction- a Necessary Evil » Disadvantages of Friction

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Drag

b.

Gravity of earth

c.

Relative motion

d.

Friction

Question number: 5

» Friction » Factors Effecting Friction » Spring Balance

MCQ▾

Question

Spring balance is used to measure the value of:

Choices

Choice (4) Response

a.

Weight of object

b.

Force of friction between the surface and object

c.

Relative motion

d.

Force

Question number: 6

» Friction » Increasing and Reducing Friction » Sliding Friction

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Sliding friction

b.

Drag

c.

Rolling Friction

d.

Treading

Question number: 7

» Friction » Increasing and Reducing Friction » Ball Bearing

MCQ▾

Question

Ball bearings are type of:

Choices

Choice (4) Response

a.

Rollers

b.

Axle

c.

Wheels

d.

Treading

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