Moment of force (Torque)
The motion of a rigid body, in general, is a combination of rotation and translation. If the body is fixed at a point or...
Centre of mass of a Uniform Rod
Suppose a rod of mass M and length L is lying along the x-axis with its one end at x = 0 and the...
Linear Momentum of a system of Particles
The linear momentum of a particle is defined as
p = m v
Let us also recall that Newton’s second law written in symbolic form for...
Motion of Centre of Mass
The definition of the centre of mass, we are now in a position to discuss its physical importance for a system of particles.
…………..(3)
Differentiating...
The centre of mass
The centre of mass of a system of particles moves as if all the mass of the system was concentrated at the centre of...
Inelastic Collision
During a collision between two bodies if there is a loss of kinetic energy, then the collision is said to be an inelastic collision.
In...
Collisions
Collision between two or more particles is the interaction for a short interval of time in which they apply relatively strong forces on each...
Conservative Forces
Forces are said to be conservative in nature if work done against the forces gets conversed in the body in form of potential energy....
Power
Power is defined as the time rate at which work is done or energy is transferred.
The average power of a force is defined as...
Conservation of Mechanical Energy
The total mechanical energy of a system is conserved if the forces, doing work on it, are conservative.
Suppose that a body undergoes displacement Δx...