A $55\mathrm{.}0$ kg cheetah accelerates from rest to its top speed of $31\mathrm{.}9$ m$/$s$.$

HINT

$($a$)$

How much net work $($in J$)$ is required for the cheetah to reach its top speed?

J

$($b$)$

One food Calorie equals $4186$ J$.$ How many Calories of net work are required for the cheetah to reach its top speed? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the energy that must be produced by the cheetah's body.