(a)[1]
Fig. 1.2 presents a cross-section of the cone and the steel ball. On Fig. 1.2, draw labelled arrows to indicate the two forces acting on the ball.
(b)[2]
Describe how the forces acting on the ball lead to centripetal acceleration.
(c)[3]
The ball travels in a circle with radius $0.15\,\text{m}$. Show that the ball's speed is $1.4\,\text{m s}^{-1}$.
(d)[2]
Calculate the ball's angular speed $\omega$.
(e)[1]
The ball's speed is increased. Explain why the radius of its circular path increases.