Laws of Motion (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 14 - 18 of 116

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Question number: 14

» Laws of Motion » Momentum

MCQ▾

Question

A force of 2 N is applied on a particle for 2 sec, the change in momentum will be -

Choices

Choice (4) Response

a.

6 Ns

b.

3 Ns

c.

4 Ns

d.

2 Ns

Question number: 15

» Laws of Motion » Force and Inertia

MCQ▾

Question

A 5 kg balls is swing in a vertical circle at the end of a cord 1 m long. The maximum speed at which it can swing if the cord can sustain maximum tension of 150 N will be –

Choices

Choice (4) Response

a.

64 m/s

b.

36.5 m/s

c.

3.18 m/s

d.

101 m/s

Question number: 16

» Laws of Motion » Momentum

Assertion-Reason▾

Assertion (Ꭺ)

The slope of momentum versus time graph! give us the acceleration.

Reason (Ꭱ)

Force is given by the rate of change on momentum.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

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: 17

» Laws of Motion » Force and Inertia

MCQ▾

Question

The string of a pendulum is horizontal. The mass of the bob is m. Now the string is released. The tension in the string in the lowest position is –

Choices

Choice (4) Response

a.

1 mg

b.

2 mg

c.

3 mg

d.

4 mg

Question number: 18

» Laws of Motion » Force and Inertia

MCQ▾

Question

A stone of mass 1 kg tied to a light inextensible string of length L = 10/6 m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the suing is 4 and if g is taken to be 10m/sec 2, the speed of the stone at the highest point of the circle is

Choices

Choice (4) Response

a.

Equation m/sec

b.

20 m/sec

c.

7.07 m/sec

d.

Equation m/sec

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