Question

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Answer 1

Answer:

initial velocity=0

time = 0.9s

Explanation:

initial velocity is zero as the throw had started.  we can get the time from the equation s = ut + ½at² .

Answer 2

Answer:

intial velocity =9m/s

time = 0.9s

explaination:-

v^2=u^2 +2as

0=u^2 + 2 ×-10×4.05

=9m/s

v=u+at

0=9+(-10)t

=0.9m/s

so the intail velocity = 9m/s

time= 0.9s