Question

A ball enters a semicircular tube with velocity v and maintains a constant velocity. Find the average force required to keep the tube stable.

(A) \(\frac{mv^2}{\pi\,r}\)

(B) \(\frac{2mv^2}{\pi\,r}\)

(C) \(\frac{2mv^2}{r}\)

(D) \(\frac{2\pi}{r}\) mv²

Answer 1

Answer is  (B) \(\frac{2mv^2}{\pi\,r}\)