# Kinematics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 202 - 205 of 233

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## Question number: 202

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A bullet of mass 10 g travelling horizontally with a velocity of 300 m/s strikes a

block of wood of mass 290 g which rests on a rough horizontal floor. After impact the block and the bullet move together and come to rest when the block has travelled a distance of 15 m. The coefficient of friction between the block and the floor will be - (Duration of impact is very short)

### Choices

Choice (4) Response

a.

½

b.

2/3

c.

¾

d.

1/3

## Question number: 203

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 800 m/s. What velocity does rifle man acquire at the end of 10 shots?

### Choices

Choice (4) Response

a.

0.3 m/s

b.

1.2 m/s

c.

0.5 m/s

d.

0.8 m/s

## Question number: 204

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

In the figure shown, the velocity of each particle at the end of 4 sec will be -

### Choices

Choice (4) Response

a.

2.18 m/s

b.

0.872 m/s

c.

0.218 m/s

d.

8.72 m/s

## Question number: 205

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

The mass of a rocket is 500 kg and the relative velocity of the gases ejecting from it is 250 m/s with respect to the rocket. The rate of burning of the fuel in order to give the rocket an initial acceleration 20 m/s 2 in the vertically upward direction (g = 10 m/s 2), will be –

### Choices

Choice (4) Response

a.

45 kg/s

b.

10 kg/s

c.

60 kg/s

d.

30 kg/s

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