When a certain force is applied to an object with a mass of $2$ kg$,$ its acceleration is $10$ m$/$s $2.$ When the

same force is applied to a different object, its acceleration is $4\mathrm{.}0$ m$/$s$2.$ What is the mass of the second

object?

a$.1\mathrm{.}25$ kg

b$.2\mathrm{.}50$ kg

c$.5\mathrm{.}0$ kg

d$.10\mathrm{.}0$ kg

e$.$ There is not enough information to determine