NCERT Class 9 Science-Force and Laws of Motion[Laws of Motion] [NCERT Based General Studies (GS)]: Questions 1 - 5 of 21

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Question 1

Question MCQ▾

Why automobiles are fitted with shockers?

Choices

Choice (4)Response

a.

To reduce jerks while passing over a rough road

b.

Increase the rate of change of momentum

c.

Both a. and b. are correct

d.

None of the above

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Question 2

Question MCQ▾

Recoil of a gun, working principle of a jet plane is based on:

Choices

Choice (4)Response

a.

Third law of motion

b.

First law of motion

c.

Second law of motion

d.

None of the above

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Question 3

Question MCQ▾

Why passengers fall backward when a bus or car suddenly starts moving forward?

Choices

Choice (4)Response

a.

Due to inertia of motion

b.

Due to inertia of rest

c.

Due to inertia

d.

None of the above

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Question 4

Question MCQ▾

Why dust particles come out of a carpet when it beaten with a stick:

Choices

Choice (4)Response

a.

Because of inertia of rest

b.

Because of inertia of motion

c.

Because of inertia

d.

All of the above

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Question 5

Question MCQ▾

Examples of inertia of direction are:

Choices

Choice (4)Response

a.

The rotating wheel of a bicycle or a motorcycle passing through a muddy stretch throws out mud tangentially

b.

When a fast moving bus or car negotiates a curve on the road passengers of the bus or car experience an outward push.

c.

Sparks produced during sharpening of a knife or blade of scissors against a grinding wheel

d.

All a., b. and c. are correct

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