Question

A ball is projected horizontally from the top of a vertical building 25.0 m above
the ground level with an initial velocity of 8.25 ms -
How long is the ball in flight before striking the ground?
(a)
(b)
How far from the building does ball strike the ground? (g = 10 ms)
​

Answer 1

Answer:20m/s

Given Range =80 m

In vertical direction :

s=ut+  

2

1

​

at  

2

⇒−80=0+  

2

1

​

×(−10)t  

2

⇒t=4 sec

In horizontal direction :

υ=  

t

range

​

=  

4

80

​

m/s=20 m/s