Gravitation Test

Result

Gravitation Test - 19

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Question 1
4 / -1

As we go from the equator to the poles, the value of g ...............

A
Remains constant

B
Decreases

C
Increases

D
Decreases upro latitude of 45^o
Question 2
4 / -1

If R is the radius of the earth and g the acceleration due to gravity on the earth’s surface, the mean density of the earth is = ...............

A
4πG/3gR

B
3πR/4gG

C
3g/4πRG

D
πRG/12g

Solution
Question 3
4 / -1

The radius of the earth is 6400 km and g=10ms^-2. In order that a body of 5 kg weights zero at the equator, the angular speed of the earth is = ............... rad/sec

A
1/80

B
1/400

C
1/800

D
1/600

Solution
Question 4
4 / -1

The time period of a simple pendulum on a freely moving artificial satellite is ............... sec

A
0

B
2

C
3

D
Infinite

Solution
Question 5
4 / -1

A spherical planet far out in space has mas Mo and diameter Do. A particle of m falling near the surface of this planet will experience an acceleration due to gravity which is equal to

A
GMo/Do²

B
4mGMo/Do²

C
4GMo/Do²

D
GmMo/Do²

Solution
Question 6
4 / -1

A body weights 700 g wt on the surface of earth How much it weight on the surface of planet whose mass is 1/7 and radius is half that of the earth

A
200g ωt

B
400g ωt

C
50 g ωt

D
300g ωt

Solution
Question 7
4 / -1

The value of g on he earth surface is 980 cm/sec² . Its value at a height of 64 km from the earth surface is ............... cm5^–2

A
960.40

B
984.90

C
982.45

D
977.55

Solution
Question 8
4 / -1

If earth rotates faster than its present speed the weight of an object will.

A
increases at the equator but remain unchanged of the poles.

B
Decreases at the equator but remain unchanged at poles.

C
Remain unchanged at the equator but decreases at poles.

D
Remain unchanged at the equator but increases at the poles.
Question 9
4 / -1

The moon’s radius is 1/4 that of earth and its mass is 1/80 times that of the earth. If g represents the acceleration due to gravity on the surface of earth, that on the surface of the moon is ..............

A
g/4

B
g/5

C
g/6

D
g/8

Solution
Question 10
4 / -1

If the density of smalll planet is that of the same as that of the earth while the radius of the planet is 0.2 times that of lthe earth, the gravitational acceleration on the surface of the planet is ...............

A
0.2g

B
0.4g

C
2g

D
4g

Solution