Question

A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is :

Answer 1

Answer:

300 m

Explanation:

The initial velocity of the ball is =20 m/s.

The final velocity of the ball is =80 m/s.

The acceleration due to gravity is =10 m/s2.

So, the height of the tower can be obtained from the expression:

v2=u2+2gh

Substitute the values in above expression:

802=202+(2×10×h)

h=206400−400 m

h=206000⇒300 m

hope it is helpful to you

mark as brainliest ...

Answer 2

Answer:

The height of the tower is :300m

SEE THE IMAGE FOR SOLUTION.