Friction-Friction- a Necessary Evil (CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science): Questions 1 - 5 of 5

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Question number: 1

» 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: 2

» 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: 3

» Friction » Friction- a Necessary Evil » How Friction Is Useful

MCQ▾

Question

Friction helps to:

Choices

Choice (4) Response

a.

Walk or run

b.

Holding objects

c.

Write on paper

d.

All a. , b. and c. are correct

Question number: 4

» Friction » Friction- a Necessary Evil » How Friction Is Useful

MCQ▾

Question

Due to fiction:

Choices

Choice (4) Response

a.

Ropes and strings can be tied

b.

Nails remain fixed

c.

Matchsticks and strings can be tied

d.

All a. , b. and c. are correct

Question number: 5

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

MCQ▾

Question

Friction:

Choices

Choice (4) Response

a.

Increases the efficiency of machine

b.

Friction is an evil

c.

Has no effect on the efficiency of machine

d.

Decreases the efficiency of machine

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