Question

Superman lived on another planet where the acceleration due to gravity is 23.6 m/s2 . If a woman falls from a building that is 88.3 m tall, how long does he have to save her before she hits the ground?

Answer 1

Acceleration due to gravity = 2.6m/s²

Length of building = d = 88.3m

Time he needed before she hits the ground = ?
 we can find the time by using the formula;

D = 1/2at²

Now putting the value;

88.3 = (1/2) a t²

88.3 = 1/2 x 23.6 x t²

t² = 88.3 / 11.8

= 7.48

t = 2.735 seconds