Question

A ball is thrown vertically upwards with velocity v from the top of a tower and it reaches the ground with speed 4v. Height of the tower is​

Answer 1

Explanation:

v²-u²=2gh

(4v)²-(v)²=2×10×h

16v²-v²=20h

15v²/20=h

h=3v²/4

Answer 2

Explanation:

.........................................