Displacement, Speed, Velocity & Acceleration Scalar quantities Scalar quantities only have a magnitude (size) Distance:?the total length between two points Speed:?the total distance trav...
Centre of Mass The centre of mass of an object is?the point at which the weight of the object may be considered to act The position of the centre of mass of uniform regular solid is at its c...
Couples A couple is a?pair?of equal and opposite?coplanar forces?that acts to produce?rotation?only A couple consists of a pair of forces that are: Equal in magnitude Opposite in direction P...
What is a Moment? A moment is the?turning effect of a force Moments occur when forces cause objects to?rotate?about some pivot The moment of a force is given by Moment (N m) = Force (N) × pe...
Resolving Vectors Two vectors can be represented by a single?resultant vector Resolving a vector is the opposite of adding vectors A single resultant vector can be resolved This means...
Scalars & Vectors A?scalar?is a?quantity?which?only?has a magnitude (size) A?vector?is a quantity which has?both?a magnitude and a direction For example, if a person goes on a hike in th...
Refractive Index Refraction occurs when light passes a boundary between two different transparent media At the boundary, the rays of light undergo a?change in direction The direction is take...
Diffraction Diffraction is the?spreading out?of waves when they pass an obstruction This obstruction is typically a narrow slit known as an aperture The extent of diffraction depends ...
Path Difference & Coherence Interference occurs when waves?overlap?and their resultant displacement is the?sum of the displacement of each wave This result is based on the principle of s...
