Question

a ball is thrown vertically upward from the top of a tower with a speed of 100 m/s. It strikes the pond near the base of the tower after 25 seconds. The height of the tower is??

Answer 1

Since , it is thrown vertically upward so g will be taken as -ve ,

now , Let g = 10m/s²

Since , it falls in the pond so v will be zero ,

= v²-u² = -2gh

= -u² = -2gh

= h = u²/2g

= h = 10000/20 =500m

So height is 500m