A metal ball of mass 5kg falls from a height of 490 m. How much time it will take to reach the ground? (g=9.8m/s2
Answers
Answered by
2
Answer:
24010 seconds
Explanation:
Potential Energy = Mass*Gravitational pull*Height
Given
Mass = 5kg, Gravitational pull = 9.8 and Height = 490m
We know that P.E = mgh = 5*9.8*490 = 24010sec
Answered by
3
Answer:
10s
Explanation:
initial velocity of metal ball=u=0
displacement travelled by metal ball=s=490
use formula,
s=ut+1/2at square
490=0*t+1/2*g*t square
490=1/2*9.8*t square
490=4.9t square
t square =100
t =10s
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