Studied by 4 people
definition of a force
a force is the result of a push or pull
what do forces change
speed of a object
direction of an object
the size of an object
the shape of an object
what is the measurement of a force
newtons (N) and is measured with a force meter or spring balance
why are forces vector
because it has mass and has direction
what happens when forces are balanced
the resultant force will be zero, when forces are not balanced there will be a resultant force
what is Newtons 1st law?
it states that if the forces of an object are balanced they will carry on in the same state of motion
what is friction
this is force that opposes motion
what is Newtons 2nd law?
if forces are not balanced then the resultant force will cause the motion of the object to change
the equation for calculating force
F= m*a
force = mass of the object * acceleration
the formula for force
f = mv- mu/ t
force = mass of final velocity - mass of initial velocity divided by time
mu= mass * initial velocity
mv = mass * final velocity
force = change in speed/time
what energy does springs store
elastic potential energy when stretched or squashed
force = extension
what is Hooke’s law
the extension of an elastic object is directly proportional to the force applied to it, can be shown in the equation:
F=Ke
f= force
K= the spring constant
e= extension of the object
what is the limit of proportionality
the point at which the load and extension are no longer proportional
what is a moment of force
the moment of force is the measure of the turning effect
the equation of moments of force
moment = force * distance
Nm = F * d
measured in newton meters
Note 
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