NEET Physics: Questions 165 - 169 of 2098

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Question number: 165

» Kinematics » Uniformly Accelerated Motion

Assertion-Reason▾

Assertion (Ꭺ)

In non-uniform circular motion, velocity vector and acceleration vector are not perpendicular to each other.

Reason (Ꭱ)

In non-uniform circular motion, particle has normal as well as tangential acceleration.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

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

Question number: 166

» Laws of Motion » Centripetal Force

MCQ▾

Question

A body of mass 0.2 kg is moving on circular path of diameter 2.0 m at the rate of 10 revolutions per 31.4 seconds. The centripetal force acting on the body is -

Choices

Choice (4) Response

a.

2N

b.

4N

c.

0.4 N

d.

0.8 N

Question number: 167

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A car driver is negotiating a curve of radius 100 m with a speed of 18 km/hr. The angle through which he has to lean from the vertical will be –

Choices

Choice (4) Response

a.

tan1140

b.

tan112

c.

tan1120

d.

tan114

Question number: 168

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball is thrown horizontally from a height of 20 m. It hits) the ground with a velocity three times its initial velocity. The initial velocity of ball is

Choices

Choice (4) Response

a.

3 m/s

b.

5 m/s

c.

7 m/s

d.

2 m/s

Question number: 169

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A particle is projected with a velocity u so that its horizontal range is twice the maximum height attained. The horizontal range is

Choices

Choice (4) Response

a.

u2g

b.

u22g

c.

4u25g

d.

2u23g

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