Question

An 82 kg jogger has 810 J of kinetic energy. What is the jogger’s velocity?

Answer 1

By definition, the kinetic energy is given by:
 $k = (1/2) * (m) * (v ^ 2)$
 Where,
 m: mass
 v: speed
 Clearing the speed we have:
 $v ^ 2 = (2 * k) / m v = \sqrt{(2 * k) / m}$
 Substituting values:
 $v = \sqrt{(2 * 810) / 82} v = 4.44 m / s$
 Answer:
 The jogger's velocity is:
 v = 4.44 m / s

Answer 2

On edge its 4.4 and i got it right