E-STAR - Student

A body is in equilibrium when the vector sum of all the forces (resultant force) acting on it is zero.
Equilibrant has the same magnitude but opposite direction to the resultant.
A force is a push or a pull exerted on a body.
Resultant force is a single force that can replace the number of forces acting on a body.
When a body under the action of forces is in equilibrium, the net force acting on it is zero.
Equilibrant force has the same magnitude as the resultant but opposite in direction to the resultant.
Torque is a measure of the turning effect of a force.
A pair of forces of the same magnitude, opposite in direction, and acting along different lines of action constitutes a couple.
A couple results in a net torque while the net force is zero.
The net torque resulting from a couple is equal to the product of one of the forces and the distance between the lines of action of the forces.
An unbalanced torque produces angular acceleration given by 𝜏 = Iα, where I is moment of inertia.
The moment of inertia of a body depends on both mass and distribution of the mass about the axis of rotation
Center of mass is a point where the total mass of a body is assumed to be concentrated.