PHYS 2212L- Midterm Exam Guide - Comprehensive Notes for the exam ( 30 pages long!)
Document Summary
These are those vectors which have a starting point or a point of application as a displacement, force etc: axial vectors. These are those vectors which represent rotational effect and act along the axis of rotation in accordance with right hand screw rule as angular velocity, torque, angular momentum etc. Those physical quantities which require only magnitude but no direction for their complete representation, are called scalars. Distance, speed, work, mass, density, etc are the examples of scalars. Scalars can be added, subtracted, multiplied or divided by simple algebraic laws. Tensors are those physical quantities which have different values in different directions at the same point. Moment of inertia, radius of gyration, modulus of elasticity, pressure, stress, conductivity, resistivity, refractive index, wave velocity and density, etc are the examples of tensors. Velocity of a stationary object, acceleration of an object moving with uniform velocity and resultant of two equal and opposite vectors are the examples of null vector: unit vector.
