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Drop a Golf ball and a Ping Pong Ball
Video Instruction
showmethephysics.com
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
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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)
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"Why is it initially so difficult to pedal a bike when you start from rest?" |
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"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
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"Why are the most massive (most inertia) football players lineman?" |
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"Why are the least massive (least inertia) football players receivers?" |
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"Receivers want to change motion, lineman want to hold their ground" |
Show Me The Physics
| Onsite Krampf |
Go to Robert Krampf's website
Eggs and Inertia - Physics.org
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Ranking
Rank the carts below from greatest inertia to least. Explain your answer.
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Task
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