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

Object Mass Velocity
W 16 2
X 15 3
Y 13 20
Z 2 30
a
Y
b
Z
c
W
d
X

Inertia is directly proportional to mass, so the object with the least mass will have the least inertia.

Based on the table, Object Z has the least mass (2) and therefore has the least inertia.

Therefore, the correct answer is b) Z.