# 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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