Question: A 6 0 . 6 kg runner has a speed of 4 . 9 0 m / s at one instant during a long -

A 60.6 kg runner has a speed of 4.90 m/s at one instant during a long-distance event.
HINT
(a)
What is the runner's kinetic energy at this instant (in J)?
J
(b)
How much net work (in J) is required to double his speed?

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