An astronaut standing on the surface of the moon throws a ball upwards. The ball would (a) directly fall down from the point it is released. (b) hang in space. (c) go up and then come back to the surface of the moon. (d) keep going up never to come back.

Answer: (c) go up and then come back to the surface of the moon.

Because the acceleration due to gravity on the moon is lower than on Earth, the ball will rise and then return to the moon’s surface.

Acceleration due to gravity

When an object falls freely towards the surface of the earth from a certain height, then its velocity changes. This change in velocity produces acceleration in the object which is known as acceleration due to gravity denoted by the letter g. The value of acceleration due to gravity is g= 9.8 m/s2.

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