The study of the motion of an object without regard to the causes of the motion.
Average Velocity (v) equals
Change in displacement divided by change in time
x/t
V =
(Vi+Vf)/2
a =
Average v/t
Vf=
Vi + at
Average x =
Vi(t) + (1/2)at^{2}^{}
V_{f}^{2} =
V_{i}^{2} + 2ax
a =
(V_{f} - V_{i})/t
Y=
X=
V_{i}Sin
V_{i}Cos
Gravitational acceleration
g = (average v)/t
Dynamics
Study of forces
Types of force
Contact force
Field force
Law of inertia
If there is no net force acting on an object it will remain at rest or in uniform motion.
If an object is in constant speed in a straight line its net force is 0.
Law of Acceleration
If there is a net force acting on an object the object will accelerate. The acceleration is directly proportional to the net force & in the same direction.
Acceleration is inversely related to the mass.
Law of Interaction
For each action there is an equal, and opposite, reaction.
Forces always occur in pairs.
Weight
F_{w}=mg
Downwards, toward center of the Earth
Normal Force/Perpendicular Force
Contact force with surface
Perpendicular with the surface
F_{n} = mgCos
Frictional Force
How hard the surfaces are pressed together.
f = mN
m = F/N
W =
F(d)
F(x)
(ma)(x)
Potential
Ability to do work. Stored energy because of an objects position or condition.
Position
gravitational potential energy
Condition
compressed spring
Gravitational Potential Energy
Scaler
PE= mgh
Elastic Potential Energy
PE = (1/2)Kx^{2}
K = N/m^{ }
Conservation of mechanical energy
v^{2 }= 2gh
Power
P = w/t
P = (Fd)/t
P = Fv
Work
W = FdCos
Kinetic Energy
KE = (1/2)mv^{2}
Momentum
p = mv
Elastic Collision
Sum of p_{i} = Sum of p_{f}
Sum of (1/2)mv^{2 }initial = Sum of (1/2)mv^{2}final_{ }