# Gravitation (KVPY Stream-SA (Class 11) Physics): Questions 9 - 11 of 12

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## Question number: 9

» Gravitation » Gravitational Acceleration

Appeared in Year: 2015

MCQ▾

### Question

The international space station is maintained in a nearly circular orbit with a mean altitude of 330 km and a maximum of 410 km. An astronaut is floating in the space station’s cabin. The acceleration of astronaut as measured from the earth is

### Choices

Choice (4) Response

a.

Nearly zero and directed towards the earth

b.

Nearly g and directed along the line of travel of the station

c.

Nearly g and directed towards the earth

d.

Zero

## Question number: 10

» Gravitation » Energy

MCQ▾

### Question

Two starts each of 1 solar mass are approaching each other for a head-on collision. When they are at a distance of 3 ⨯ 107 km, their speeds are negligible. The speed with which they collide is –

(The radius of each star is 105 km, assume the stars to remain undistorted until they collide. . )

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 11

» Gravitation » Energy

MCQ▾

### Question

Two starts each of 1 solar mass are approaching each other for a head-on collision. When they are at a distance of 109 km, their speeds are negligible. The speed with which they collide is –

(The radius of each star is 104 km, assume the stars to remain undistorted until they collide. . )

### Choices

Choice (4) Response

a.

b.

c.

d.

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