A mass vibrates back and forth from the free end of an ideal spring $(k=20\frac{N}{m}$ with an amplitude of $0\mathrm{.}25$ m $.$ What is the maximum kinetic energy of this vibrating mass?

It is impossible to give an answer since kinetic energy cannot be determined without knowing the object's

mass.

$5\mathrm{.}0$ J

$2\mathrm{.}5$ J

$0\mathrm{.}63$ J

$1\mathrm{.}3$ J