Question

A mass of 500 g travels a distance of 260 m in a time of t = 4 s. lts kinetic energy equal

Answer 1

A mass of 500 g travels a distance of 260 m in a time of t = 4 s. lts kinetic energy equal

The correct answer:1056.25 J

:The explanation 

k=½ m× v² : v= d/t = 260/ 4= 65 m/s

k= ½ ×500/100 ×65²= 1056.25 J