In finite objects, the total external force equals the total mass times the acceleration of a point called the centre of mass.
Uniform circular motion: angular displacement and velocity are introduced and centripetal acceleration is determined.
The total work done on an object equals the increase in its kinetic energy. For conservative forces, we can define potential energy.
On scales much bigger than the wavelength, rays explain the behaviour of interfaces, mirrors, lenses, optical instruments, including telescopes and microscopes.
The inverse square law explains planetary motion - and apples falling. Newton's law, measuring G, calculating orbits.
Sound is produced in the larynx; filtering it in the vocal tract produces formants and phonemes. The acoustics, mechanics and some neurobiology of hearing. Pitch perception.
Superposing waves with different frequencies gives beats and Tartini tones. Removing beats gives consonance. Tuning consonances gives temperament.
p=mv. If external forces are zero, momentum is conserved. In collisions, energy may be conserved (elastic) or not (inelastic).
Kinematics quantifies motion without explaining the causes of it. Here we study accelerations that are zero, positive or negative.
F=ma (laws 1&2). Forces come in pairs that add to zero (3). Newton's laws apply in inertial frames of reference. Some common approximations made in applying them.
Inertia and restoring forces can, with low friction or damping, lead to oscillations and resonance. We analyse the mechanics of vibrations.
Motion with uniform acceleration, such as in a uniform gravitational (or electric) field is projectile motion, analysed here with examples.
Previous | Page:
Items per page: