Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 170 - 175 of 285

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Question 170

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Question

MCQ▾

A meteor is falling. How much gravitational acceleration would it experience when its height from the surface of the earth is equal to five times the radius of the earth? (Given that the acceleration due to gravity on the surface of the earth is )

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Choice (4)Response

a.

b.

c.

d.

Question 171

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Question

MCQ▾

The mass of a sphere is three times of the mass of another sphere . The sphere moves at velocity of the sphere . The ratio of the kinetic energy of sphere to that of is:

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Choice (4)Response

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b.

c.

d.

Question 172

Physics
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Question

MCQ▾

In a steel block is released from a height of and an identical block made up of wooden is released from same height simultaneously, in vacuum, then which blocks reach the ground first?

Choices

Choice (4)Response

a.

Wooden block

b.

Steel block

c.

Steel and Wooden block reach at same time

d.

None of the above

Question 173

Physics
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Question

MCQ▾

A man walks in first 10 min and in next . The velocity at the end of from the start is,

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Choice (4)Response

a.

b.

c.

d.

Question 174

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Question

MCQ▾

The dimension formula of the impulse is:

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Choice (4)Response

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b.

c.

d.

Question 175

Physics
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Question

MCQ▾

A sound source is having a frequency . Calculate numbers of vibration in a minute.

Choices

Choice (4)Response

a.

14400

b.

40

c.

240

d.

None of the above