a metal ball of mass 5 kg falls from a height of 490 m .how much time will it take to reach the ground.(g=9.8m/s2).answer it I will like u and rate u 5 star.
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Answer:
10 seconds
Explanation:
let the downward direction positive
initial velocity, u = 0
s = ut+1/2at^2
a = g ( acc. due to gravity) = 9.8 m/s^2
s = 490 m
490 = 0 + 1/2*9.8t^2
t^2 = 490/4.9
t = √100
t = 10 seconds
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