Newtons Laws And Momentum
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Unit of Force
Newton
Define Force
a push of a pull, occurs in pairs, causes motion
Friction
A force that opposes motion
Inertia
A resistance to a change in motion, objects with more mass have more inertia
Mass
the amount of matter something contains, units are kg
Net Force
the result of two or more forces being added together
Newton
Sir Isaac Newton, 3 laws of motion
First law
an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an unbalanced force
Normal Force
a force opposite weight
Second Law
F=ma
action force
force done by Mr G on the floor
reaction force
force done by the floor on Mr G
third law
for every action there is an equal and opposite reaction
momentum
p=mv, unit= kg*m/s
law of the conservation of matter
pBefore = pAfter