Gravitation Test

Result

Gravitation Test - 34

Score
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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

The masses and radii of earth and moon are M₁, R₁ and M₂, R₂ respectively. Their centres is d distance of apart ? The minimum velocity with which a particle of mass m should be projected From a point midway between their centres so that it escapes to infinity is...............

A

B

C

D

Solution
Question 3
4 / -1

A rocket is launched with velocity 10 kms^–1. If radius of earth is R then maximum height attained by it will be = ..............

A
2R

B
3R

C
4R

D
5R

Solution
Question 4
4 / -1

What is the intensity of gravitational field at the center of spherical shell

A

B
g

C
zero

D
None of these
Question 5
4 / -1

Escape velocity of a body of 1 kg. on a planet is 100 ms^–1. Gravitational potential energy of the body at the planet is =............... J

A
–5000

B
–1000

C
–2400

D
5000

Solution
Question 6
4 / -1

A body of mass m kg starts falling from a point 2R above the earth’s surface. Its K.E. when it has fallen to a point ‘R’ above the Earth’s surface = .....................[R - Radius of Earth, M - mass of Earth G - Gravitational constant]

A

B

C

D

Solution
Question 7
4 / -1

The Gravitational P.E. of a body of mas m at the earth’s surface is -mgRe. Its gravitational potential energy at a height Re from the earth’s surface will be = ............ here (Re is the radius of the earth)

A

B

C

D

Solution
Question 8
4 / -1

A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is ..........

A
R/3

B
R/2

C
R/4

D
R/5

Solution
Question 9
4 / -1

Energy required to move a body of mass m from an orbit of radius 2R to 3R is ................

A

B

C

D

Solution
Question 10
4 / -1

Radius of orbit of satellite of earth is R. Its K.E. is proportional to

A

B

C
R

D

Solution