A child is sitting on a swing. Its minimum and maximum heights from the ground are 0.75 m and 2 m respectively. Its maximum speed will be -

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Question

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RSMSSB Lab Assistant 2018 Official Paper

Answer 1

Formula Used:

Maximum Speed (v) = \(\sqrt{2g(H_2-H_1)}\)

Here, g is the acceleration due to gravity

H₂ is the maximum height

H₁ is the minimum height

Application:

We have,

g = 10 (assume)

H₂ - H₁ = 2 - 0.75 = 1.25 m

Using the above formula:

v = \(\sqrt{2\times 10 \times 1.25}= \sqrt{25}=5\ m/s\)