NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 885 - 888 of 2320

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Question number: 885

» 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: 886

» 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

Question number: 887

» Laws of Motion » Newton's Law » Newton's Second Law of Motion

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MCQ▾

Question

Conservation of linear momentum is equivalent to-

Choices

Choice (4)Response

a.

Newton’s second law of motion

b.

Newton ‘s third law of motion

c.

Conservation of angular momentum.

d.

Newton ‘s first law of motion

Question number: 888

» Work, Energy and Power » Potential Energy

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MCQ▾

Question

A body of mass 1 kg initially at rest explodes and breaks into three fragments of masses in the ratio 1: 1: 3. The two pieces of equal mass fly off perpendicular to each other with a speed of 30 m/sec each. What is the velocity of the heavier fragment?

Choices

Choice (4)Response

a.

b.

c.

d.

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