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Drop a Golf ball and a Ping Pong Ball

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Newton's 2nd Law: When the Net Force > 0

The acceleration of a body depends directly on the net force acting on it and indirectly on the body's mass

 (m) a = Fnet (N) (s2) m (Kg)

Inertia - an object's resistance to a change in motion due to its mass

 Mass and Inertia are directly related

Larger the Mass,

the Greater the Inertia

Inertia and Mass Directly Related

Twice the Mass,
Twice the Inertia

(an object's resistance to being accelerated
by a force due to its mass)

 "Why is it initially so difficult to pedal a bike when you start from rest?"

 "And why is it so easy to pedal the bike once you obtain your desired speed?"

Inertia - When you first start pedaling you are
feeling the inertial of the bike and body.
(force required to change motion)

Once in motion you only need to apply a
force to offset friction

 "Why are the most massive (most inertia) football players lineman?"

 "Why are the least massive (least inertia) football players receivers?"

 "Receivers want to change motion, lineman want to hold their ground"

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Show Me The Physics

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Eggs and Inertia - Physics.org

 Ranking Task   Rank the carts below from greatest inertia to least. Explain your answer.