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dynamics,2D motion/trajectories,newtons laws, force, gravity

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Newtons 1st law
an object maintains a state of equilibrium,remaining at rest or moving with a constant velocity, unless acted upon by an unbalanced force.
unbalanced force
nonzero net force acting on an object which produces a change in an object's velocity (vector) this change produces an acceleration because the objects speed direction or both.
Ineria
resistance of objects change in motion, this inertia is directly proportional to its mass.
Newtons 2nd law
when an unbalanced force acts on an object, the object is accelerated in the same direction as the force. The acceleration is directly proportional to the magnitude of the unbalanced force and inversly proportional to the mass of the object
newton
is a direved unit of force that is needed to make a 1kg object accelerate 1 m/s.
F net = m X a
2nd law formula
an apple or burger
a newton is equal to the mass of an apple which is 1/4 a lb
3rd law
every action has an equal and opposite reaction. Every force has an equal and opposite force.
acceleration
half the mass produces 2wice the acceleration
F and A are directly related
F=ma
F= 0
object is at rest or constant velocity
unbalanced forces
change motion, speed and or direction
0.0 m/s
when gravity takes away all vertical motion at the peak