# Kinematics-Motion in a Straight Line (NEET Physics): Questions 34 - 37 of 47

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## Question number: 34

» Kinematics » Motion in a Straight Line

Assertion-Reason▾

### Assertion (Ꭺ)

A body having non-zero acceleration can have a constant velocity.

### Reason (Ꭱ)

Acceleration is the rate of change of velocity.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

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

d.

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

## Question number: 35

» Kinematics » Motion in a Straight Line

MCQ▾

### Question

The motion of a body is given by the equation dv (t) /dt = 6.0 - 3v (t), where v (t) is speed in m/s and t in sec.

If body was at rest at t = 0

### Choices

Choice (4) Response

a.

The speed varies with the time as v (t) = 2 (1 – e -5t) m/s

b.

The magnitude of the initial acceleration is 6.0 m/s2

c.

The speed is 0.1 m/s when the acceleration is half the initial value

d.

The terminal speed is 4 m/s

## Question number: 36

» Kinematics » Motion in a Straight Line

MCQ▾

### Question

A particle moves towards east with velocity 5 m/s. After 10 seconds its direction changes towards north with same velocity. The average acceleration of the particle is

### Choices

Choice (4) Response

a.

m/s 2 S-W

b.

m/s 2 N-W

c.

zero

d.

m/s 2 N-E

## Question number: 37

» Kinematics » Motion in a Straight Line

MCQ▾

### Question

A 120 m long train is moving towards west with a speed of 10 m/s. A bird flying towards east with a speed of 5 m/s crosses the train. The time taken by the bird to cross the train will be

### Choices

Choice (4) Response

a.

8 sec

b.

14 sec

c.

16 sec

d.

12 sec

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