# Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 245 - 250 of 285

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## Question number: 245

Edit

### Question

MCQ▾

If identical particles of masses and are moving with velocities and , respectively; then the ratio of their kinetic energy is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 246

Edit

### Question

MCQ▾

If two bodies are in contact, then the direction of force of friction between these two bodies is:

### Choices

Choice (4)Response

a.

Parallel to the contact surface

b.

Inclined at to the contact surface

c.

Normal to the contact surface

d.

Inclined at to the contact surface

## Question number: 247

Physics
Edit

### Question

MCQ▾

A stone is thrown vertically upwards with a velocity of . What is the total time for which the stone will remain in the air?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 248

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### Question

MCQ▾

For maximum work, angle between force and displacement should be:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 249

Edit

### Question

MCQ▾

One person does some work in time and another person does same amount of work in time. If the time is greater than time , and power of first person is and power of second person is ; then:

### Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

## Question number: 250

Edit

### Question

MCQ▾

Consider a body of weight on the surface of earth, and its weight on the moon is . If its mass on the earth is , then its mass on the moon is:

### Choices

Choice (4)Response

a.

b.

c.

d.