1 A stationary object remains stationary
if the sum of the forces acting upon it
(resultant force) is zero
2 A moving object with a zero resultant force
keeps moving at the same speed and in the
same direction
3 Acceleration depends on the force
applied to an object and the object's
mass
4 Resultant Force - forced acting on an object (eg.
different strengths and directions). This single
force has the same effect on the object as all the
individual forces acting together
5 Factos that affect the size of the acceleration
5.1 Size of the force
5.1.1 The bigger the force, the greater
the acceleration
5.1.2 Doubling the size of the resultant
force, doubles the acceleration
5.2 The mass
5.2.1 A force on a large mass will accelerate
it less than the same force on a smaller
mass
5.2.2 Doubling the mass, halves
the acceleration
5.3 a = F divided by m
5.3.1 a = acceleration of the object in
meters per second squared (m/s2)
5.3.2 F = resultant force in newtons (N)
5.3.3 m = the mass of the object
in kilograms (kg)