Question

Please solve this question based on kinematics​

Answer 1

Answer:

a)20m/s b)from ground 0,from top 80

Explanation:

a)v2-u2=2as

asu=0 (droped sitution)

v we need to find

substituting we will get v=20

b)s=ut+1/2at2

u =0,t given 4

substituting we get s=80from the top

Answer 2

Answer:

Explanation:

v^2=u^2+2as

v^2 = 20(20)

v=20 m/s

h=80m