A particle attached to a light string completes a vertical circle of radius R. Which statements are necessarily correct?

Select all that apply

• Option A

  At the top, T + mg = mv²/R

• Option B

  At the bottom, T - mg = mv²/R

• Option C

  Speed at the bottom is greater than speed at the top

• Option D

  Tension must be the same at diametrically opposite points