NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 174 - 178 of 2320

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Question number: 174

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MCQ▾

Question

An air craft executes a horizontal loop of radius 1 km with a steady speed of 900 km/h. The ratio of centripetal acceleration to that gravitational acceleration will beta)

Choices

Choice (4)Response

a.

2.25: 9.8

b.

6.38: 1

c.

2.5: 9.8

d.

1: 6.38

Question number: 175

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MCQ▾

Question

A body is projected downdwards at an angle of 30° to the horizontal with a velocity of 9.8 m/s from the top of a tower 29.4 m high. How long will it take before striking the ground?

Choices

Choice (4)Response

a.

Is

b.

2s

c.

4s

d.

3s

Question number: 176

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MCQ▾

Question

A ball projected with speed ‘u’ at an angle of projection 15° has range R. The other angle of projection at which the range will not be same with same initial speed ‘u’ is

Choices

Choice (4)Response

a.

35°

b.

90°

c.

45°

d.

75°

Question number: 177

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MCQ▾

Question

A body of mass 2 kg lying on a smooth surface is attached to a string 3 m long and then whirled round in a horizontal circle making 60 revolution per minute. The centripetal acceleration will be

Choices

Choice (4)Response

a.

118.4 m/s 2

b.

2.368 m/s 2

c.

23.68 m/s 2

d.

1.18 m/s 2

Question number: 178

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MCQ▾

Question

A body of mass 0.1 kg is moving on circular path of diameter 1.0 m at the rate of 10 revolutions per 31.4 seconds. The centripetal force acting on the body is -

Choices

Choice (4)Response

a.

2N

b.

4N

c.

0.2 N

d.

0.4 N

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