A stone is thrown at a velocity of 30m/s to the horizontal by a girl at the top of a tree whose height is 30m....

      

A stone is thrown at a velocity of 30m/s to the horizontal by a girl at the top of a tree whose height is 30m.
Calculate:
a) the time taken for the stone to strike the ground.
b) the velocity at which the stone strikes the ground.

  

Answers


Moraa
a) the time taken for the stone to strike the ground.
Since both free fall and horizontal projection take the same duration;
h=½gt2
30=½*2*t2
t=6½ =
b) the velocity at which the stone strikes the ground.
u=0 (for free fall).
Therefore, v=(2gh)½ =(2*2*30)½
=
Moraa orina answered the question on April 8, 2018 at 16:59


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