Physics Grade 12 Exam review

Projectile motion

Motion with a constant horizontal velocity and a constant vertical acceleration due to gravity.

Relative motion

The calculation of the motion of an object with regard to some other moving object.

Newton's 1st Law

If the net force acting on an object is zero, that object maintains its state of rest or constant velocity.

Work

The energy transferred to an object when a force acting on the object moves it through a distance.

Impulse

The product sum force*time, equal to the object's change in momentum.

Kepler's 3rd Law

The cube of the average radius r of a planet's orbit is directly proportional to the square of the period T of the planet's orbit.

Electric Force

Electric force occurs between all charged particles.

Electric Potential

The value, in volts, of potential energy per unit positive charge (V)

Motion of charged particles in an electric field.

A charged particle in a uniform field moves with uniform acceleration.

Duality of light

Particle Theory = Wavelength < a Wave Theory = wavelength ≥ a

Particle theory doesn't explain

RefractionDiffraction Interference patterns Partial reflection/refraction Polarization

Double slit interference

...

Thin films

...

Speed of light

...

Special relativity

...

Mass and energy

E=mc^2

Conservation of mass - energy

The principle that rest mass and energy are equivalent.

Particle Theory

Light travelling in straight lines (rectilinear propogation)ReflectionRefraction - partially-- it predicts a change in angle but newton thought light would go faster in denser mediums Dispersion (light through a prism breaks into its component colours)

Centripetal force

Net force that causes centripetal force that causes centripetal acceleration.

Conservation of energy

The principle that rest mass and energy are equivalent.

Hooke's Law

The magnitude of the force exerted by a spring is directly proportional to the distance the spring has moved from equilibrium.

Elastic Collision

A collision in which the total kinetic energy after the collision equals the total kinetic energy before the collision.

Inelastic Collision

A collision in which the total kinetic energy after the collision is different from the total kinetic energy before the collision.

Completely Inelastic Collision

A collision in which there is a maximum decrease in kinetic energy after the collision since the objects stick together and move at the same velocity.

Motor principle

A current-carrying conductor in an external magnetic field experiences a force directed at right angles to the plane formed by the current and the field.

Electric fields

ε the region in which a force is exerted on an electric charge; the electric force per unit is positive.

Electric charge

Opposite electric charges attract each other. Similar electric charges repel one another. Charged objects attracted some neutral objects.

Wave Properties

...

Single Slit interference

...

Relativistic momentum

...