APFIVE Variable Angular Acceleration
A disk rotating at 25 rad/s begins to slow down with an angular acceleration given by $$\alpha = -0.5\omega$$ (in rad/s²). How long will it take for the disk to come to rest (ω = 0)?
A
2 s
B
2 ln(2) s ≈ 2.77 s
C
50 s
D
Infinity (the disk never truly stops)
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | gizatturegaliev | 0 | 1 | 0m 00s | -10 |
| #2 | ijiwon073 | 1 | 1 | 2m 45s | -65 |
| #3 | chiangd935 | 1 | 1 | 5m 10s | -210 |
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