Moon's Revolution around Earth

Q.

A satellite is revolving around the Earth in a well defined circular orbit, the gravitational force between the Earth and satellite is the centripetal force of the circular motion. What can we say about the motion of the satellite if the gravitational force becomes zero?

1. None of these

2. The satellite will continue moving in its circular orbit

3. The satellite will move tangentially

4. The satellite would come at rest

Q.

The magnitude of force exerted by the Earth on the Moon is same as that of the force exerted by the Moon on the Earth.

1. True

2. False

Q.

The Moon and the earth attract each other, why does it not collapse into Earth?

1. Due to the centripetal force which is the force of gravity exerted by earth on the moon.

2. The sun's gravitational force is greater than that of the earth

3. The mass of the moon is less than that of the earth

4. The absence of gravity in space

Q. The Earth and the Moon attract each other, but why doesn't the Moon collapse into Earth?

1. The sun's gravitational force is greater than that of the earth
2. The mass of the moon is less than that of the earth
3. Due to centripetal force which is the force of gravity exerted by earth on moon
4. The absence of gravity in space

Q. Newton assumed the shape of Moon's orbit as ___ in the process of derivation of the law of gravitation.

1. parabolic
2. circular
3. spherical
4. straight

Q.

The interaction between the Earth and the Moon, which keeps the Moon revolving around the Earth is a _______ force.

1. pull

2. pull and push

3. push

4. push and pull

Q.

Even though stone and Earth attract each other, Earth does not appear move because of its:

1. lesser mass

2. greater mass

3. low temperature

4. high speed

Q. If the medium between Earth and the Moon was made 10 times denser, then the gravitational force between the two would increase by 10 fold.

1. True
2. False

Q.

The picture shows a bucket being whirled around in a vertical circle, with a help of a string with very high constant speed. What is a correlation between above action and the motion of the moon around the Earth?

1. All of the above.

2. If there is no string, the bucket will not whirl. Similarly, if there is no gravitational force, there will be no moon revolving around the Earth.

3. The bucket is in uniform circular motion like the moon.

4. The force exerted by the thread on the bucket (Tension force) is replaced by the gravitational force in case of the moon.

Q. Earth attracts moon. Why does it not collapse into the Earth?

1. The sun's gravitational force on the moon is greater than that of Earth.
2. Speed of the moon is just enough for it to revolve at the height.
3. The moon is falling at a slow rate and we cannot feel the difference.
4. The mass of the moon is less than that of Earth.

Q. Newton assumed the shape of moon's orbit as ___ in the process of derivation of law of gravitation.

1. parabolic
2. straight
3. circular
4. spherical