Vertical Circle — Tension at BottomHardQuestion 30619
Question
A ball (mass m) moves in a vertical circle (radius r). Tension at the bottom when moving at speed v_b is:
- Amv_b²/r
- Bmv_b²/r − mg
- Cmg
- Dmv_b²/r + mgCorrect
Correct answer
mv_b²/r + mg
Explanation
At the bottom: T − mg = mv_b²/r (centripetal direction is upward). T = mg + mv_b²/r.