Question

The amount of kinetic energy an object has depends on its.

Answer 1

Formula
KE = 1/2 m v^2

Discussion
The formula shows that the Kinetic Energy has 2 parts
m = mass
v = speed

So if you increase either the mass or the speed, you will get an increase in Kinetic Energy.

Answer
mass
speed

Answer 2

The amount of kinetic energy an object has depends on its "speed." Kinetic energy is energy a object has while its in motion so the key word is speed.

Hope this helps!