Kinetic Energy
If an object of mass m has velocity v, its kinetic energy K is
Kinetic energy is a scalar quantity. The kinetic energy of an...
Work-Energy Theorem
The work-energy theorem states that the change in kinetic energy of a body is the work done by the net force on the body.
Kf...
Work
Work is related to force and the displacement over which it acts. Consider a constant force F acting on an object of mass m....
Friction and Circular Motion
Friction
The property by virtue of which the relative motion between two surfaces in contact is opposed is known as friction.
Frictional Forces -
Tangential forces developed...
Conservation of Linear Momentum
Law of Conservation of Momentum:
The total momentum of an isolated system of particles is conserved. The law follows from the second and third law...
Laws of Motion
Force:
A force is necessary to keep a body in uniform motion is wrong. A force is necessary for the practice to counter the opposing...
Motion in a Plane
In this section, we shall see how to describe motion in two dimensions using vectors.
Position Vector and Displacement:
The position vector r of a particle...
Scalar
A scalar quantity is a quantity with magnitude only. It is specified completely by a single number, along with the proper unit.
Examples are: the...
Resolution of a vector in a plane and Unit Vector
Resolution of a Vector in a Plane:
Let a and b be any two nonzero vectors in a plane with different directions and let A...
Vectors
In physics, we can classify quantities as scalars or vectors. Basically, the difference is that a direction is associated with a vector but not...