What is the kinetic energy of a `10kg` mass moving at a speed of `30 km h^(-1)` in calorie?

Explanation

The kinetic energy is
`(1)/(2)m upsilon ^(2) = (1)/(2) xx 10 kg xx((33 xx10^(2)m)/(3600 s))^(2)`
`= 500 J = (500)/(4.186)cal= 120 cal`