An astronaut standing on the surface of the moon throws a ball upwards. The ball would

Question87):

Suppose a new planet is discovered between Uranus and Neptune. Its time period would be

Less than that of Neptune.
More than that of Neptune.
Equal to that of Neptune or Uranus.
Less than that of Uranus.

Answer:

1

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Directly fall down from the point it is released.

Hang in space

Go up and then come back to the surface of the moon.

Keep going up never to come back.

answer is C.

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Detailed Solution

An astronaut standing on the surface of the moon throws a ball upwards. The ball would go up and then come back to the surface of the moon.
As we know the acceleration due to gravity on the surface of the Moon is

1.62519 m / s^{2}

, about

16.6 %

of that on Earth's surface. i.e the acceleration due to gravity on the moon is lower than on Earth and therefore, the ball will rise and then return to the moon's surface.
Its time period would be less than that of Neptune.
Since the time period is directly related to the distance from the sun. Now if a new planet is discovered between Uranus and Neptune is discovered then Neptune will have less time period than the Neptune and greater than the Uranus.

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