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Physics

Grade-7

Easy

Question

What is the fixed velocity of the moving object?

27 m/s
25 m/s
30 m/s
54 m/s

hint Hint:

27 m/s

The correct answer is: 27 m/s

KE = 675 J
m = 50 kg
KE = $1 half$ mv²
$675 space equals space 1 half space left parenthesis 50 right parenthesis space straight v squared not stretchy rightwards double arrow space straight v squared space equals space fraction numerator 675 space cross times space 2 over denominator 50 end fraction straight v space equals space 27 space straight m divided by straight s$

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