A metal ball of 5kg falls from height of 490m. How much time it will take to reach ground?
Mansi1001:
STD. 10
Maharashtra board
N u too same na
no I am not same
Nisha
STD. 10
Telangana board
kk
This question came in our exam
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Answers
Answered by
15
By Newton's equation
s=ut +½ gt²
490= 0t + ½9.8t²
490×2÷9.8= t²
980÷9.8= t²
t² = 100
t=10
therefore that metal ball will take 10s to reach the ground.
s=ut +½ gt²
490= 0t + ½9.8t²
490×2÷9.8= t²
980÷9.8= t²
t² = 100
t=10
therefore that metal ball will take 10s to reach the ground.
Answered by
2
t=√2h/g
=√980/9.8
=√100
=10 seconds
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