An 18 kg bicycle carrying a 62 kg girl is traveling at a speed of 7 m/s. What is the kinetic energy of the girl and bicycle?

To get the answer we have to substitute total mass and velocity to the formulaE=[tex] \frac{1}{2} mv^2[/tex], soE=[tex] \frac{1}{2} (18+62)*7^2= \frac{1}{2}*80*49=40*49= 1960J [/tex] - its the answer

ke=1/2 mv^2(.5)(80)(7^2)=1960 joules