summary of Newton's laws and momentum

a summary of the key points needed for as physics on Newton's laws and Momentum.

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Summary of Newton's laws and momentum
Newton's first law:
If there is no resultant force acting on an object,
If it is at rest, it will stay at rest,
If it is moving, it keeps moving at a constant velocity (at constant speed in
a straight line)
Newton's second law:
The rate of change of momentum of an object is
directly proportional to the resultant of the force acting on it:
The change of momentum takes place in the direction of the force.
If the mass is constant, then Force = mass x acceleration or F = ma

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Newton's third law:
If an object A exerts a force on an object B, then B exerts an equal but
opposite force on A.
The inertia of an object is it's reluctance to change velocity, inertia increases
with increasing mass.…read more

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The area under a force time curve gives the total impulse acting, which equals
the total change in momentum produced.
The unit of force is the Newton. The Newton can be defined in two ways:
1 Newton is the resultant force needed to cause a rate of change of
momentum of 1 Kg m s-1 each second, or
1 Newton is the resultant force needed to give a mass of 1 Kg an
acceleration of 1 m s-2.…read more

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