Quantities in Physics. Dynamics of a mass point. Work, kinetic energy, potential energy. Energy conservation. Momentum and angular momentum. Collisions. Kinetic theory of gas. Ideal and viscous fluids, motion of a body in a fluid. First and second law of themodynamics.
Angelo Baracca "Fisica per Scienze biologiche ed ambientali"
no specific objectives.
It is a basic course of physics
as indicated by the CdL
Type of Assessment
written and oral exam
QUANTITIES IN PHYSICS
Scalar and vectorial quantities, dimensions units, comparison with everyday experience. Operation with vectors: sum, difference, dot product (scalar), cross product (vectorial)
DYNAMICS (POINT MASS)
The three principles of mechanics, inertial reference frames.
Weight, gravitational force, elastic force. Friction. The simple pendulum and the harmonic motion.
fictitious (non-inertial) forces: centrifugal force, Coriolis force.
WORK and ENERGY
Work and theorem of kinetic energy. Conservative forces, Potential energy, Conservation of mechanical energy.
Gravitational and elastic potential energy. From energy to forces: stable and unstable equilibrium.
DYNAMICS with MORE THAN ONE BODY
Internal and external forces, conservation of momentum and angular momentum for isolated systems.
Center of mass, kinetic energy for a rotating solid body, momentum of inertia.
Elastic and inelastic collisions, analysis in the center-of-mass reference frame.
Kinetic theories of gas, internal energy for a mono- and a bi-atomic gas
General concepts: amplitude, wavelength, period, wavenumber, frequency, propagation speed. D'Alambert equation. Stationary waves, fundamental tone.
Incompressibility, Pascal law, hydraulic jack. Hydrostatic pressure, barometric pressure. Water (and mercury) barometer, atmospheric pressure, manometer. Archimede force, buoyancy, application to centrifuges.
Moving fluids, Bernoulli law (mechanical energy conservation), non intuitive consequences (pressure vs velocity, syphon flow).
Viscous fluid, laminar and turbulent motion, Reynolds number. Objects moving in a fluid: viscous and turbulent drag, asymptotic speed in both regimes, characteristic timescales to reach the asymptotic speed, equation of motion and their solutions.