Question

let me answer with explanation immediately please

Answer 1

hey mate

here is your answer

this is only possible when the body is at its maximum height when the time is 5s and then the body comes at rest momentarily and again starts to fall.

we know that,

t=u/g

where t=time

u=intial velocity

g=acceleration due to gravity

thus,

taking the value of g as 10m /s²

(you may take the given value)

thus,

u=t*g

=5*10

=50 m/s

or when g=9.8 m/s²

then

u=5*9.8

=49 m/s