Part of JME-06 — Circular Motion & Centripetal Force

Key Formulae Quick Reference

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UCM:

  • v = romega, omega = 2pi/T = 2pif
  • aca_c = v2v^2/r = r*omega2omega^2, FcF_c = mv2mv^2/r

Vertical Circle (string, length L):

  • Top: T + mg = mv2mv^2/L; min v = sqrt(gL)
  • Bottom: T - mg = mv2mv^2/L; min v = sqrt(5gL)
  • TbottomT_{bottom} - TtopT_{top} = 6mg

Vertical Circle (rod):

  • Min v at top = 0; min v at bottom = 2*sqrt(gL)

Banked Road:

  • No friction: v = sqrt(rg*tan(theta))
  • Max speed: vmaxv_{max} = sqrt(rg(tan(theta)+mu)/(1-mu*tan(theta)))
  • Min speed: vminv_{min} = sqrt(rg(tan(theta)-mu)/(1+mu*tan(theta)))

Flat road: vmaxv_{max} = sqrt(mu*rg)

Conical pendulum: T = 2pisqrtLcos(thetag\frac{L*cos(theta}{g})

Non-uniform: aneta_{net} = sqrt(ac2a_c^2 + at2a_t^2)

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