Question

the acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?

Answer 1

The distance that a ball can be thrown upwards is V^2/(2g). V^2 will presumably be the same on Mars, although a heavy and bulky space suit and the lighter weight of the person's arm would change V somewhat. Muscles of astronauts also tend to deteriorate the longer they stay in space. They probably expect you to ignore these effects upon V.

With "g" changed from 9.8 to 3.7, and V the same. the distance thrown upwards is longer by a factor 9.8/3.7 = 2.65