The table below shows the mass and velocity of four objects. Which object has the least inertia?

Object | Mass (kg) | Velocity (m/s)
W 16 2
X 15 3
Y 13 20
Z 2 30
a
W
b
X
c
Y
d
Z

The object with the least inertia is object Z with a mass of 2 kg and a velocity of 30 m/s.