Tipers Answer Key B6 -

Where (v) is the speed at the top, (r) is the radius.

It is important to clarify a common point of confusion for physics students: available for free or public distribution. TIPERS (Tasks Inspired by Physics Education Research) are copyrighted workbooks published by Pearson. Instructors use them as graded assignments, so answer keys are restricted to educator resources. tipers answer key b6

Why? Because the centripetal force requires to point downward, so (T + mg > mg). The only exception is the hypothetical minimum speed where (T=0), giving (F_{net}=mg), but in practice the ball would just barely complete the circle with zero tension. Where (v) is the speed at the top, (r) is the radius

[ T + mg = \frac{mv^2}{r} ]