Torque and Centre of Gravity
Torque is also known as moment of force or couple. When a force acts on a particle, the particle does not merely move in the direction of the force but it also turns about some point. So, we can define the torque for a particle about a point as the vector product of position vector of the point where the force acts and with the force itself. In the given figure, balancing of a cardboard on the tip of a pencil is done. The point of support, G is the centre of gravity.
Choose the correct option.
Options:
(a) `tau_(Mg)` about `CG =0`
(b) `tau_A` about `CG = 0`
(c) Net `tau` due to `m_1g, m_2g` ,...., `m_ng` about `CG =0`
(d) All of the above