Question

(5.) -
A Ball is projected vertically up with
a velocity of 20 m/s. Its volocity when
it reaches is 15m
height is ___m/s. (take G =10m/s)
(1.) 10 (2.) 15 (3.) 20 (4.) none of these ​

Answer 1

Answer:

none of these

the answer my is 50

Answer 2

Answer:

use equation

v^2= u^2 - 2×g×s

v^ 2 = 20×20 - 2×10× 15

v^2 = 100

v= 10 m/s

therefore answer is 1.