# Kinematics-Average Speed and Instantaneous Velocity (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 96 - 99 of 108

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## Question number: 96

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A bullet of mass 0.01 kg travelling at a speed of 300 m/s strikes a block of mass 2 kg, which is suspended by a string of length 5 m. The center of gravity of the block is found to rise a vertical distance of 0.1 m The speed of the bullet after it emerges from the block will be -

### Choices

Choice (4) Response

a.

220 m/s

b.

110 m/s

c.

20 m/s

d.

1.4 m/s

## Question number: 97

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A bullet of mass 20 g hits a block of mass 1.98 kg suspended from a massless string of length 100 cm and sticks to it. The bullet flies down at an angle of 30° to the horizontal with a velocity of 200 m/s. Through what height the block will rise-

### Choices

Choice (4) Response

a.

0.75 m

b.

0.45 m

c.

0.30 m

d.

0.15 m

## Question number: 98

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

The rate of burning of fuel in a rocket is 60 gm/sec. and comes out with and velocity 5 x 10 3 m/s. The force exerted by gas on rocket will be –

### Choices

Choice (4) Response

a.

2.5 x l0 4 N

b.

2.5 x l0 6 N

c.

300 N

d.

200 N

## Question number: 99

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A 30 g bullet pierces through a plate of mass m 1 = 1 kg and then comes to rest inside a second plate of mass m 2 = 1.5 kg. It is found that the two plates, initially at rest, now move with equal velocities. The percentage loss in the initial velocity of bullet when it is between m1 and m 2. (Neglect any loss of material of the bodies, due to action of bullet. ) will be -

### Choices

Choice (4) Response

a.

25.67%

b.

46.45%

c.

20.68%

d.

39.525%

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