NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 882 - 885 of 2184

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Question number: 882

» Laws of Motion » Laws of Friction

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MCQ▾

Question

The work done by a person in carrying a box of mass 10 kg through a vertical height of 10 m is 4900 J. The mass of the person is -

Choices

Choice (4) Response

a.

40 kg

b.

130 kg

c.

50 kg

d.

60 kg

Question number: 883

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

Question

A rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 800 m/s. What velocity does rifle man acquire at the end of 10 shots?

Choices

Choice (4) Response

a.

0.3 m/s

b.

0.5 m/s

c.

1.2 m/s

d.

0.8 m/s

Question number: 884

» Laws of Motion » Force and Inertia

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MCQ▾

Question

Choose the correct statements -

(1) For equilibrium of a body under the action of concurrent forces

(2) If the downward acceleration of the lift is a = g, then the body will experience weightlessness.

(3) If the downward acceleration of the body is a > g, then the body will rise up to the ceiling of lift

(4) If the downward acceleration of the lift is a > g, then the body will experience weightlessness.

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1,2 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct

Question number: 885

» Work, Energy and Power » Work Done

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MCQ▾

Question

A force F = (7 - 2x + 3x 2) N is applied on a 2 kg mass which displaces it from x = 0 to x = 5 m. Work done in joule is -

Choices

Choice (4) Response

a.

135

b.

35

c.

70

d.

270