# Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 73 - 77 of 108

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## Question number: 73

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A disc of mass 10 gm is kept horizontally in air by firing bullets of mass 5 g each at the rate of 10/s. If the bullets rebound with same speed. The velocity with which the bullets are fired is –

### Choices

Choice (4) Response

a.

147 cm/s

b.

49 cm/s

c.

196 cm/s

d.

98 cm/s

## Question number: 74

» Kinematics » Average Speed and Instantaneous Velocity

Assertion-Reason▾

### Assertion (Ꭺ)

The relative velocity between any two bodies moving in opposite direction is equal to sum of the velocities of two bodies.

### Reason (Ꭱ)

Sometimes relative velocity between two bodies is equal to difference in velocities of the two.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

## Question number: 75

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A man is walking on a level road at a speed of 3 km/h. Raindrops fall vertically with a speed of 4 km/h. Find the velocity of raindrops with respect to the men.

### Choices

Choice (4) Response

a.

4 km/hr

b.

7 km/hr

c.

5 km/hr

d.

3 km/hr

## Question number: 76

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

In the above example, the height ascended or descended, as the case may be, during that time i. e. 4 sec will be -

### Choices

Choice (4) Response

a.

1.744 m

b.

0.1744 m

c.

17.44 m

d.

All of the above

## Question number: 77

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A 20 g bullet pierces through a plate of mass m1 = 1 kg and then comes to rest inside a second plate of mass n1 = 2.98 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%

b.

30%

c.

45%

d.

20%