Gravitation Test

Result

Gravitation Test - 35

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Weekly Quiz Competition

Question 1
4 / -1

A particle falls towards earth from infinity. It’s velocity reaching the earth would be.............

A
Infinity

B

C

D
Zero

Solution
Question 2
4 / -1

The escape velocity of a sphere of mass m from earth having mass M and Radius R is given by

A

B

C

D
Question 3
4 / -1

The escape velocity for a rocket from earth is 11.2 kms^–1 value on a planet where acceleration due to gravity is double that on earth and diameter of the planet is twice that of earth will be = …….kms^–1

A
11.2

B
22.4

C
5.6

D
53.6

Solution
Question 4
4 / -1

The escape velocity from the earth is about 11 kms^–1. The escape velocity from a planet having twice the radius and the same mean density as the earth is = ……… kms^–1.

A
22

B
11

C
5.5

D
15.5

Solution
Question 5
4 / -1

If g is the acceleration due to gravity at the earth’s surface and r is the radius of the earth, the escape velocity for the body to escape out of earth’s gravitational field is ……….

A
gr

B

C
g/r

D
r/g
Question 6
4 / -1

The escape velocity of a projectile from the earth is approximately

A
11.2 kms^–1

B
112 kms^–1

C
11.2 ms^–1

D
1120 kms^–1
Question 7
4 / -1

The escape velocity of a particle of mass m varies as ………….

A
m²

B
m

C
m^o

D
m^–1
Question 8
4 / -1

The escape velocity of an object from the earth depends upon the mass of earth (M), its mean density (ρ), its radius (R) and gravitational constant (G), thus the formula for escape velocity is

A

B

C

D
Question 9
4 / -1

Two small and heavy sphere, each of mass M, are placed distance r apart on a horizontal surface the gravitational potential at a mid point on the line joining the centre of spheres is

A
Zero

B

C

D

Solution
Question 10
4 / -1

The escape velocity of a body from earth’s surface is Ve. The escape velocity of the same body from a height equal to 7 R from earth’s surface will be

A

B

C

D

Solution