P8 Forces in balance

displacement

Distance in a given direction

driving force

Force of a vehicle that makes it move (sometimes referred to as motive force)

forces

A force (in newtons

free-body force diagram

A diagram that shows the forces acting on an object without any other objects or forces shown

friction

The force opposing the relative motion of two solid surfaces in contact

magnitude

The size or amount of a physical quantity

Newton's first law of motion

If the resultant force on an object is zero

Newton's third law of motion

When two objects interact with each other

parallelogram of forces

A geometrical method used to find the resultant of two forces that do not act along the same line

resultant force

A single force that has the same effect as all the forces acting on the object

scalar

A physical quantity

vector

A physical quantity