Question

The figure shows a thin rod, of length L = 2.10 m and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m = 7.10 kg is attached to the other end. The rod is pulled aside to angle θ₀ = 5.3° and released with initial velocity v→0 = 0. (a) What is the speed of the ball at the lowest point? (b) Does the speed increase, decrease, or remain the same if
the mass is increased?

Answer 1

The solution is given below.

(a)

(b)

As we see from part a that v is independent of the mass m .

So the speed remains same if the mass is increased .

Thank you.