🏁 Rolling Race: Ball vs Disc
Time
0.00 s
Ball (sphere)
0.00 m/s
Disc
0.00 m/s
Incline:
5.0°
Restart race
Rolling without slipping: a = g·sinθ / (1 + I/mr²).
Ball: I = ⅖mr² → a = (5/7)g·sinθ
Disc: I = ½mr² → a = (2/3)g·sinθ
The ball always wins — less of its energy goes into spinning.
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