From the top of a tower of two stones, whose masses are in the ratio 1: 2 are thrown on straight up with an initial speed u and the second straight down with the same speed u. Then, neglecting air resistance

Options

A. the heavier stone hits the ground with a higher speed
B. the lighter stone hits the ground with a higher speed
C. both the stones will have the same speed when they hit the ground
D. the speed can't be determined with the given data.

Answer

c

Explanation

Both Max, height start to fall down with the same initial velocity and fall through the same height. The ih velocity is independent of the mass. Therefore, (a) both, when they fall down, will take the same time to fall to the ground at a height h.
`h=ut+(1)/(2)gt^(2)`