science-16/7/21
contact forces
friction
reaction
tension
air resistance
non-contact forces
magnetic
electrostatic
gravitational
resultant force
When two or more forces act on an object, the resultant force can be found by adding up the individual forces.
vector diagrams
Vector diagrams are used to break down a single force into two forces acting at right angles to each other.
scalar and vector power
Scalars are quantities that are fully described by a magnitude alone. Vectors are quantities that are fully described by both a magnitude and a direction.
work done
Work is done when energy is transferred from one store to another.
speed and velocity
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
distance time graphs and velocity time graphs- 