E = MV^2 ÷ 2 + mgh, If M=20, h=15, E=4900, g=9.8. Find V

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asked Jul 28, 2022 178k views

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E = MV^2 ÷ 2 + mgh, If M=20, h=15, E=4900, g=9.8. Find V

Mathematics
high-school

Jinceon asked

by Jinceon

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Answer:

V = 14 m/s

Explanation:

$E = MV^2 ÷ 2 + mgh \\ \\ 4900 = 20V^2 ÷ 2 + 20 * 9.8 * 15 \\ \\ 4900 = 10V^2 + 2,940\\ \\ 4900 - 2940 = 10V^2 \\ \\ 1960 = 10V^2 \\ \\ V^2 = (1960)/(10) \\ \\ V^2 = 196 \\ \\ V = √(196) \\ \\ V = 14 \: m {s}^( - 1)$

Causaelity answered Aug 3, 2022

by Causaelity

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