Basic Physics
Newton's Laws:
Newton's First Law:
An object has a constant velocity unless there is a net force acting on it.
Newton's Second Law:
The rate of change of momentum with time is proportional to the net applied force and is in the same direction.
Newton's Third Law:
For every action (force) there is a reaction force and the action and reaction forces are equal in magnitude, opposite in direction, and act upon different bodies.
Equations:
Newtonian
F = ma
KE = ½mv2
m1v1 = m2v2
E&M
To be added
Problems:
Newtonian
Basic object collision
E&M
To be added
Conversions:
Distance
1" » 2.54 cm
1' » 30.5 cm
1 yrd. » 0.915 m
1 mile » 1610 m
1000 m = 1 km
100 cm = 1 m
Speed
1 mile/hr » 1.610 km/hr
1 km/hr » 0.6211 miles/hr
1 m/sec » 2.236 miles/hr
Mass
1 kg » 2.2 lbs.
(please read below)
1000 g = 1 kg
1000 mg = 1 g
Note: An object's weight is not a measurement of mass, but a measurement of force. Weight is equal to an object's mass multiplied by the standard acceleration of gravity given our planet's mass and a specific distance from the center of mass [w = mg (g » 9.80665 m/s2)]. So, 1 kg accelerated at 9.80665 m/s2 is almost exactly 2.2 lbs. The English unit for mass is actually called a slug. 1 slug accelerated at 1 ft/s2 = 1 lbs. This unit of measurement is no longer used to my knowledge.