# Gravitation (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 49 - 54 of 84

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## Question number: 49

» Gravitation » Universal Law of Gravitation

MCQ▾

### Question

A particle is suspended from a spring and it stretches the spring by 1 cm on the surface of earth. The same particle will stretches the same spring at a place 800 km above earth surface by -

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 50

» Gravitation » Gravitational Acceleration

MCQ▾

### Question

At what height above the earth’s surface the acceleration due to gravity will be of its value at the earth’s surface? Radius of earth is 6400 km

### Choices

Choice (4) Response

a.

25600 km

b.

2228 km

c.

12800 km

d.

2560 km

## Question number: 51

» Gravitation » Universal Law of Gravitation

MCQ▾

### Question

Three particles of equal mass m are situated at the vertices of an equilateral triangle of side l. What should be the velocity of each particle, so that they move on a circular path without changing l?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 52

» Gravitation » Energy

MCQ▾

### Question

If g is the acceleration due to gravity on the earth’s surface the gain in P. E. of an object of mass m raised from the surface of the earth to a height of the radius R of the earth is -

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 53

» Gravitation » Universal Law of Gravitation

MCQ▾

### Question

What is the mass of the planet that has a satellite whose time period is T and orbital radius is r?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 54

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

### Question

The speed with which the earth have to rotate on its axis so that a person on the equator would weigh the as much as present will be - (Take the equatorial radius as 6400 km. )

### Choices

Choice (4) Response

a.

b.