# Gravitation-Energy (KVPY Stream-SA (Class 11) Physics): Questions 1 - 3 of 3

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## Question number: 1

» Gravitation » Energy

Appeared in Year: 2015

MCQ▾

### Question

A planet is orbiting the sun is an elliptical orbit. Let U denote the potential energy and K denote the kinetic energy of the planet at an arbitrary point on the orbit. Choose the correct statement

### Choices

Choice (4) Response

a.

for two positions of the planet in the orbit

b.

always

c.

always

d.

always

## Question number: 2

» 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: 3

» 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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