# Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 263 - 268 of 285

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## Question number: 263

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### Question

MCQ▾

If two particles of same mass are travelling with speeds and respectively, then the ratio of their kinetic energies is:

### Choices

Choice (4)Response

a.

b.

c.

1

d.

## Question number: 264

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### Question

MCQ▾

An engine develops of power. How much time will it take to lift a mass of to a height of .

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 265

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### Question

MCQ▾

An astronaut of weight feel heavier, when a space vehicle is moving vertically upward with a constant acceleration . When will the astronauts weight becomes ?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 266

Physics
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### Question

MCQ▾

A ball dropped from the top of a building of height splashes into a pool of water at its base. Time taken by sound of the splash heard at the top is:

(Velocity of sound and )

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Choice (4)Response

a.

b.

c.

d.

## Question number: 267

Physics
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### Question

MCQ▾

A cycle is moved with an initial velocity of is subject to a uniform acceleration of . The displacement of in next is –

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 268

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### Question

MCQ▾

A man is pulling up a block of weight for a length of on smooth plane inclined at an angle of with the horizontal. Work done by the man is:

### Choices

Choice (4)Response

a.

b.

c.

d.