NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 949 - 953 of 2184

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Question number: 949

» Kinematics » Uniformly Accelerated Motion

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Question

A force produces an acceleration of 10 m/s 2 in a body and same force an acceleration of 25 m/s 2 in another body. The acceleration produced by the same force when applied to the combination of two bodies will be –

Choices

Choice (4) Response

a.

7.142 m/s 2

b.

3.75 m/s 2

c.

20 m/s 2

d.

0.667 m/s 2

Question number: 950

» Laws of Motion » Force and Inertia

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Question

A rope of length 15 m and linear density 2 kg/m is lying length wise on a horizontal smooth table. It is pulled by a force of 25 N. The tension in the rope at the point 7 m away from the point of application, will be –

Choices

Choice (4) Response

a.

36.67 N

b.

13.33 N

c.

11.67 N

d.

Question does not provide sufficient data or is vague

Question number: 951

» Work, Energy and Power » Work-Energy Theorem

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Question

The earth circles the sun once a year. How much work would have to be done on the earth to bring it to rest relative to the sun, (ignore the rotation of earth about -its own axis) Given that mass of the earth is 6 x 10 24 kg and distance between the sun and earth is 1.5 x 10 8 km-

Choices

Choice (4) Response

a.

1.9 x 10 23

b.

2.7 x 10 24

c.

2.7 x 10 33

d.

1.9 x 10 24

Question number: 952

» Kinematics » Average Speed and Instantaneous Velocity

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Question

The rate of burning of fuel in a rocket is 30 gm/sec. and comes out with and velocity 6 x 10 3 m/s. The force exerted by gas on rocket will be –

Choices

Choice (4) Response

a.

180 N

b.

200 N

c.

2.5 x l0 6 N

d.

300 N

Question number: 953

» Kinematics » Uniformly Accelerated Motion

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Question

Consider the double Atwood’s machine as shown in the figure. What is acceleration of the masses?

 Double atwood machine

Double Atwood Machine

Mass acting on double atwood machine

Choices

Choice (4) Response

a.

g

b.

g/4

c.

g/2

d.

g/3