Force and Motion
Key Words
Newton's First Law
If the resultant force on a stationary object is zero, the object will remain stationary.
If the resultant force on a moving object is zero, it'll just carry on moving at the same velocity.
Resultant Force - the overall force on a point or object.
Mass - the amount of 'stuff' in a object.
Weight - the force acting on an object due to gravity.
Gravitational Force - the force of attaction between masses.
Newton's Second Law
Inertia - when an object stays in the same state of motion.
Newton's Third Law
When two objects interact, the forces they exert on each other are equal and opposite.
Equilibrium - when the forces on an object are balanced.
Friction - the force resisting movement between objects.
Reaction time - the time it takes for a person think see something then do something.
Momentum - how much 'oomph' an object has.
Also see Forces, Motion, Force & Pressure.
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