Next time you watch a drag race, notice the wheels. Are they solid metal discs, or do they have holes drilled through the rims? I came up with this somewhat silly, but incredibly powerful quick science demonstration to show my 2nd year university students how one set of rims could really make a difference on the racetrack (with all other things being equal).
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Yes, m = mass in either kg or lbm
I’m assuming that the m in the formula 1/2 * (mr²) represents mass. Is that right?