Laws of Motion (NEET Physics): Questions 5 - 8 of 114

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Question number: 5

» Laws of Motion » Centripetal Force

MCQ▾

Question

The maximum speed at which a car can turn round a curve of 40 metre radius on a level road if the coefficient of friction between the tyres and the road is 0.6, will be –

Choices

Choice (4) Response

a.

15.3 m/s

b.

9.0 m/s

c.

10.8 m/s

d.

17.8 m/s

Question number: 6

» Laws of Motion » Centripetal Force

MCQ▾

Question

A smooth table is placed horizontally and a spring of unstarched length 0 and force constant k has one end fixed to its center. To the other end of the spring is attached a mass m which is making n revolution per second around the center. Tension in the spring will be

Choices

Choice (4) Response

a.

4π2mkl0n2(k+4π2mn2)

b.

2πmkl0n2(k4π2mn2)

c.

2π2mkl0n2(k4π2mn2)

d.

4π2mkl0n2(k4π2mn2)

Question number: 7

» Laws of Motion » Centripetal Force

MCQ▾

Question

The maximum speed at which a car can turn round a curve of 30 meter radius on a level road if the coefficient of friction between the tiers and the road is 0.4, will be –

Choices

Choice (4) Response

a.

11.76 m/s

b.

17.84 m/s

c.

9.02 m/s

d.

10.84 m/s

Question number: 8

» Laws of Motion » Centripetal Force

MCQ▾

Question

Choose the correct statements

(1) Centripetal force is not a real force. It is only the requirement for circular motion.

(2) Work done by centripetal force may or may not be zero.

(3) Work done by centripetal force is always zero.

(4) Centripetal force is a fundamental force.

Choices

Choice (4) Response

a.

1, 2 and 3

b.

1 and 3

c.

2 and 4

d.

1 and 2

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