Mistake Master
Mistake Master · AP Physics 1 · Unit 6 · Step-Through Animation
The Energy of Going Nowhere Fast
You'll learnhow much energy a spinning object stores, and why its shape matters.
A flywheel bolted to an axle never moves an inch — and it can power a bus across town. Meet kinetic energy's rotational twin, where the speed that matters is angular and the square is still the whole story.
SPIN LAB
Before you start
What you're looking at
A massive flywheel bolted to a fixed axle, spinning in place; a two-account bar chart tracks its energy.
The question
Its center never moves, so translational KE is zero — how can it still carry energy?
Watch for
The green rotational-energy bar rising while the blue translational bar sits pinned at zero.
What the symbols mean
Blue bar = translational KE, striped green bar = rotational KE; the yellow arc marks spin direction.
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