Answer:
4000 J
Step-by-step explanation:
The energy possessed by virtue of motion of the body is called its kinetic energy. 
When a body is in motion , it has kinetic energy. 
Mass of the object, m = 80 kg 
velocity of the object, v = 10 m/s 
The formula for the kinetic energy is given by 

K = 0.5 x 80 x 10 x 10 
K = 4000 J
Thus, the kinetic energy of the object is 4000 J.