$35)$ A mass vibrates back and forth from the free end of an ideal spring k$=50$ N$/$m with an amplitude of

$0\mathrm{.}25$ m$.$ What is the maximum kinetic energy of this vibrating mass? $35)\_\_\_\_\_\_$

A$)1\mathrm{.}3$ J

B$)5\mathrm{.}0$ J

C$)0\mathrm{.}63$ J

D$)2\mathrm{.}5$ J