A metal ball of mass 5kg falls from a height of 490 m. How much
time it will take to reach the ground ? (g = 9,8 m/sec^2)
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Step-by-step explanation:
initial velocity=0
height=490m
acceleration due to gravity=9.8m/s²
time=?
final velocity=?
acceleration of the metal ball=9.8m/s²
final velocity=
s=ut+1/2at²
490=0×t+9.8t²/2
490=4.9t²
t²=490/4.9
t²=100
t=10
therefore, the metal ball takes 10 second to reach the ground
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