NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 920 - 923 of 2320

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Question number: 920

» Work, Energy and Power » Work Done

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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.

65.08 J

b.

98.08 J

c.

56.08 J

d.

56.80 J

Question number: 921

» Laws of Motion » Laws of Friction

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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.

63°

b.

27°

c.

37°

d.

53°

Question number: 922

» Kinematics » Average Speed and Instantaneous Velocity

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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 6 N

b.

300 N

c.

2.5 x l0 4 N

d.

200 N

Question number: 923

» Kinematics » Average Speed and Instantaneous Velocity

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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.

20.68%

b.

46.45%

c.

39.525%

d.

25.67%

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