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 Equation 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. Equation . )

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 11

» Gravitation » Energy

MCQ▾

Question

Two starts each of 1 solar mass Equation 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. Equation . )

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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