Explain the torque acting on a rigid body.

What is torque? Explain the torque acting on a particle.

The vector sum of a system of non-collinear forces acting on a rigid body is given to be non-zero. If the vector sum of all the torques due to the system of forces about a certain point is found to be zero, does this mean that it is necessarily zero about any arbitrary point?

There are three forces F_(1) F_(2) and F_(3) acting on a body, all acting on a point P on the body. The body is found to move with uniform speed. (a) Show that the forces are coplanar. (b) Show that the torque acting on the body about any point due to these three forces is zero.

Explain the reflection of wave at rigid support.

What is a rigid body ? Explain the differences between rigid body and solid body.

Write the formula of work done by torque in rotational rigid body about a the fixed axis.

Why the components of position vectors along axis are not needed for determining the torque in the rigid body?

When the torque acting on electric dipole in uniform electric field becomes zero ?

What is the torque acting on the centre of mass due to gravitational force ?