# Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 51 - 56 of 285

Access detailed explanations (illustrated with images and videos) to 2000 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access & Unlimited Time!

View Sample Explanation or View Features.

Rs. 550.00 -OR-

## Question number: 51

Physics
Edit

### Question

MCQ▾

The sound waves can travel:

### Choices

Choice (4)Response

a.

in medium only, not in vacuum

b.

in vacuum only, not in medium

c.

in vacuum as well as in medium

d.

in medium as well as in vacuum

## Question number: 52

Physics
Edit

### Question

MCQ▾

If the directions of the velocity and acceleration of a bike are opposite, then the bike rider –

### Choices

Choice (4)Response

a.

Doing nothing

b.

Applying breaks for negative acceleration

c.

Keep speed constant.

d.

Applying positive acceleration

## Question number: 53

Edit

### Question

MCQ▾

If we have taken, a spherical objects to the centre of the earth, then:

### Choices

Choice (4)Response

a.

Its weight becomes zero.

b.

Its weight is unaffected.

c.

Its weight increase as R decrease.

d.

Question does not provide sufficient data or is vague

## Question number: 54

Physics
Edit

### Question

MCQ▾

A child slides down an inclined surface. The speed changes at a constant rate from to in . Then its acceleration is –

### Choices

Choice (4)Response

a.

b.

c.

d.

Cannot determine

## Question number: 55

Edit

### Question

MCQ▾

In SI system, is the unit of:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 56

Edit

### Question

MCQ▾

If two identical bodies of mass , placed apart, then gravitational force between them is:

### Choices

Choice (4)Response

a.

b.

c.

3.33

d.