# Laws of Motion-Law of Conservation of Linear Momentum (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 4 - 7 of 7

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## Question number: 4

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

### Question

A bob of mass 0.5 kg hangs from the massless string of a long simple pendulum. A bullet of mass 0.05 kg is fired vertically from below into the bob. The bullet gets embedded into the bob and the combination rises vertically through a height of 3.2 m. If g = 10 m s-2, then the velocity of the bullet is,

### Choices

Choice (4) Response

a.

88 m s-1

b.

880 m s-1

c.

8800 m s-1

d.

8 m s-1

## Question number: 5

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

### Question

A rifle bullet loses of its velocity in passing through a plank. The least number of such planks required to stop the bullet is –

### Choices

Choice (4) Response

a.

20

b.

11

c.

5

d.

10

## Question number: 6

» Laws of Motion » Law of Conservation of Linear Momentum

Appeared in Year: 2015

MCQ▾

### Question

An object is dropped from height of 16 m. It gets embedded in 1.5 m of sand and stops.

### Choices

Choice (4) Response

a.

Only kinetic energy is conserved

b.

Neither K. E. nor momentum are conserved

c.

K. E and momentum are conserved

d.

Only momentum is conserved

## Question number: 7

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

### Question

A 30 g bullet passes through a plate of mass 1 kg and finally comes to rest inside another plate of mass 2970 g. It makes the plates move from rest to same velocity. The percentage loss in velocity of bullet between the plates is –

### Choices

Choice (4) Response

a.

50%

b.

0

c.

75%

d.

25%

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