Question

A metallic ball is hanging by a string from a fixed support. Draw a neat labelled diagram showing the forces acting on the ball and the string.

Answer 1

When a metallic ball is hanging by a string from a fixed support, the forces acting on the string are: (represented by blue coloured arrows in the diagram)
   1) Tension T applied by wall acting vertically upward.
   2) Tension T applied by ball acting vertically downward.
The forces acting on the ball are: (represented by red coloured arrows in the diagram)
  1) Tension T applied by string acting vertically upward.
  2) Gravitational pull (mg) acting vertically downward.