# 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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### Page 1

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:…

### Page 2

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.
The momentum, p, of an object depends on it's mass,…

### Page 3

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…