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Chiranjib · Answer 1 · 2018-02-07T09:28:55+0000

Remember the equation for kinetic energy?

$kinetic = (1)/(2) m {v}^(2)$

From the question, we know that:
Mass, m = 7kg
Velocity, v = 4 m/s

All you need to do is plug those values into the equation and you'll get its kinetic energy in units of Joules (J). Tadaa!

$kinetic = (1)/(2) (7) {(4)}^(2)$

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