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3 years ago

12

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

2 answers:

yan [13]3 years ago

3 0

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

zalisa [80]3 years ago

3 0

On edge its 4.4 and i got it right

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