Answer:
Kinetic energy is 1000 J.
Step-by-step explanation:
Given:
Mass of the bicycle,

Distance traveled,

Time of travel,

Unknowns:
Speed of the bicycler,
.
Kinetic energy of the bicycler.
Equation:
Speed of the bicycler is,

Therefore, the kinetic energy of the bicycler is given as,

Substitute:
Plug in 5 m/s for
and 80 kg for
. Solve for KE.
Solve:

Therefore, his kinetic energy is 1000 J.