Scalar Quantities:
Physical quantities which have magnitude only and no direction are called
scalar quantities.
Example: Mass,
speed, volume, work, time, power, energy etc
Vector Quantities:
Physical quantities which have magnitude and direction both and which obey
triangle law are called vector Quantities.
Example:
Displacement, velocity, acceleration, force, momentum, torque etc.
Electric current, though has a direction, is a scalar
quantity because it does not obey triangle law.
Moment of inertia, pressure, refractive index, and stress
are tensor quantities.
Distance:
Distance is the length of actual path covered by a moving object in a given
time interval.
Displacement:
Shortest distance covered by a body in a definite direction is called
displacement.
·
Distance is a scalar quantity whereas
displacement is a vector quantity both having the same unit (metre)
·
Displacement may be positive, negative or ozro
whereas distance is always positive.
·
In general,, magnitude of displacement ≤
distance
