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

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

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.

12 m/s 2 S-W

b.

12 m/s 2 N-W

c.

zero

d.

12 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

Sign In