Question #f8416

1 Answer
Jan 12, 2017

Answer:

He is running at 4.5 m/s

Explanation:

Since kinetic energy is #1/2mv^2#, we can find his speed as follows:

#K=1/2mv^2#

#v^2=2K/m#

#v=sqrt ((2K)/m) = sqrt (((2)(734))/72.5)=4.5 m/s#