Question

2.
A ball is projected vertically up with a speed 'u' from a building of certain height. When it reaches
ground its speed is '3u'. Find
a) height of the building
b) at what time, ball is again at the initial position of projection
c) time of flight
d) distance travelled by ball
e) displacement of the ball​

Answer 1

Answer:

a) height of the building-100 km