NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 165 - 168 of 2184

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Question number: 165

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

Question

A ball ‘A’ is projected from origin with an initial velocity v0 = 700 cm/sec in a direction 37° above the horizontal as shown in fig Another ball ‘B’ 300 cm from origin on a line 37° above the horizontal is released from rest at the instant A starts. How far will B have fallen when it is hit by A?

Choices

Choice (4) Response

a.

900 cm

b.

9 cm

c.

90 cm

d.

0.9 cm

Question number: 166

» Kinematics » Uniformly Accelerated Motion

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Assertion-Reason▾

Question

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.

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

d.

Both Ꭺ and Ꭱ are false

Question number: 167

» Laws of Motion » Centripetal Force

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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.

0.4 N

b.

2N

c.

4N

d.

0.8 N

Question number: 168

» Kinematics » Average Speed and Instantaneous Velocity

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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.

b.

c.

d.