NEET (NTA-National Eligibility cum Medical Entrance Test) Physics: Questions 918 - 922 of 2142

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Question number: 918

» Laws of Motion » Laws of Friction

MCQ▾

Question

A block is kept on a horizontal table. The table is undergoing simple harmonic motion of frequency 4 Hz in a horizontal plane. The coefficient of static friction between the block and the table surface is 0.70. Find the maximum amplitude of the table at which the block does not slip on the surface (g = 10 ms -2)

Choices

Choice (4) Response

a.

0.04 m

b.

0.03 m

c.

0.011 m

d.

0.02 m

Question number: 919

» Work, Energy and Power » Work Done

MCQ▾

Question

The work done in pulling a body of mass 3 kg along an inclined plane (angle 60°) with coefficient of friction 0.2 through 2 m, will be -

Choices

Choice (4) Response

a.

98.08 J

b.

56.80 J

c.

56.08 J

d.

65.08 J

Question number: 920

» Laws of Motion » Laws of Friction

MCQ▾

Question

A body of mass 800 g slides on a rough horizontal surface. If the frictional force is 6.0 N, the angle made by the contact force on the body with the vertical will be

Choices

Choice (4) Response

a.

27°

b.

63°

c.

53°

d.

37°

Question number: 921

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The rate of burning of fuel in a rocket is 60 gm/sec. and comes out with and velocity 5 x 10 3 m/s. The force exerted by gas on rocket will be –

Choices

Choice (4) Response

a.

2.5 x l0 4 N

b.

2.5 x l0 6 N

c.

300 N

d.

200 N

Question number: 922

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A 30 g bullet pierces through a plate of mass m 1 = 1 kg and then comes to rest inside a second plate of mass m 2 = 1.5 kg. It is found that the two plates, initially at rest, now move with equal velocities. The percentage loss in the initial velocity of bullet when it is between m1 and m 2. (Neglect any loss of material of the bodies, due to action of bullet. ) will be -

Choices

Choice (4) Response

a.

25.67%

b.

46.45%

c.

20.68%

d.

39.525%

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