Question:
A child is sitting on a swing. Its minimum and maximum heights from the ground 0.75 m and 2 m respectively, its maximum speed will be
A child is sitting on a swing. Its minimum and maximum heights from the ground 0.75 m and 2 m respectively, its maximum speed will be
Updated On: May 25, 2022
- 10 m/s
- 5 m/s
- 8 m/s
- 15 m/s
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The Correct Option is B
Solution and Explanation
Drop in P.E = maximum K.E.
mg (2 - 0.75) = 1 mv$^2 \, \, \Rightarrow \, \, \, v=\sqrt{2g(1.25)} = 5\,m/s$.
mg (2 - 0.75) = 1 mv$^2 \, \, \Rightarrow \, \, \, v=\sqrt{2g(1.25)} = 5\,m/s$.
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