NEET Physics: Questions 842 - 846 of 2099

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Question number: 842

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

In the fig shown, the velocity of each particle at the end of 4 sec will be -

Two mases A and B on a pulley system

Two Mases a and B on a Pulley System

Understanding the velocity of each particle

Choices

Choice (4) Response
a.

0.218 m/s

b.

1.744 m/s

c.

0.872 m/s

d.

2.18 m/s

Question number: 843

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A body of mass 2 kg strikes elastically with another body at rest and continues to move in the same direction with one fourth of its initial velocity. The mass of the other body is –

Choices

Choice (4) Response
a.

4 kg

b.

0.6 kg

c.

2.4 kg

d.

1.2 kg

Question number: 844

» Laws of Motion » Laws of Friction

MCQ▾

Question

If the coefficient of friction between an insect and bowl is u and the radius of the bowl is r, find the maximum height to which the insect can crawl in the bowl.

Choices

Choice (4) Response
a.

R[11μ2+1]

b.

R[11μ2+1]

c.

R[11μ21]

d.

R[1+1μ2+1]

Question number: 845

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A bullet of mass 0.01 kg travelling at a speed of 200 m/s strikes a block of mass 2 kg, which is suspended by a string of length 5 m. The center of gravity of the block is found to rise a vertical distance of 0.1 m The speed of the bullet after it emerges from the block will be -

Choices

Choice (4) Response
a.

1.4 m/s

b.

220 m/s

c.

20 m/s

d.

80 m/s

Question number: 846

» Work, Energy and Power » Elastic and Inelastic Collisions

Assertion-Reason▾

Assertion (Ꭺ)

A particle of mass m strikes a wedge of mass M horizontally as shown in the figure. If collision is perfectly inelastic then, it can be concluded that the particle sticks to the wedge.

Particle of mass m strikes a wedge of mass M horizontally

Particle of Mass M Strikes a Wedge of Mass M Horizontally

In above we figure we show that the triangle, and the particle have mass m and M.

Reason (Ꭱ)

In perfectly inelastic collision velocity of both bodies is same along common normal just after collision.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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