Kinematics (NEET Physics): Questions 43 - 46 of 229

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Question number: 43

» Kinematics » Motion in a Plane

MCQ▾

Question

A man throws balls with the same speed vertically upwards, one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time? (Given g = 9.8 m/s2)

Choices

Choice (4) Response

a.

At least 0.8 m/s

b.

Only with speed 19.6 m/s

c.

More than 19.6 m/s

d.

Any speed less than 19.6 m/s

Question number: 44

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A ball is thrown vertically upwards. Which of the following graphs represent velocity-time graph of the ball during its flight? (Air resistance is neglected)

Choices

Choice (4) Response

a.

b.

velocity-time graph of the ball - Choice B

Velocity-Time Graph of the Ball - Choice B

velocity-time graph of the ball - Answer B

c.

velocity-time graph of the ball - Choice C

Velocity-Time Graph of the Ball - Choice C

velocity-time graph of the ball -Answer c

d.

velocity-time graph of the ball -Choice D

Velocity-Time Graph of the Ball -Choice D

velocity-time graph of the ball - Answer D

Question number: 45

» Kinematics » Motion in a Straight Line

Assertion-Reason▾

Assertion (Ꭺ)

The position-time graph of a uniform motion in one dimension of a body can have negative slope.

Reason (Ꭱ)

When the speed of body decreases with time, the position-time graph of the moving body has negative slope.

Choices

Choice (4) Response

a.

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

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

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

Question number: 46

» Kinematics » Motion in a Straight Line

MCQ▾

Question

the x-axis at certain times is given below

the x-axis at certain times is given below

t (s)

0

1

2

3

x (m)

-2

0

6

16

Which of the following describes the motion correctly

Choices

Choice (4) Response

a.

Uniform, accelerated

b.

Non-uniform, accelerated

c.

Uniform, decelerated

d.

All of the above

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