On Mars' moon Deimos, where a = 2.15 × 10-3m/sec2.
An object dropped from a height of 100 m has distance above the ground of
M(t) = 100 - a/2t2
where a is the acceleration of gravity. For each of the above planet with the given acceleration, find the time when the object hits the ground, and the speed of the object at that time.