Chapter 8 Forces on systems Newtons 3rd law Every force occurs as one member of an action/reaction pair of forces The two members of an action/reaction pair act on two different objects The two members of an action/reaction pair are equal in magnitu
Chapter 10
Energy as a Conserved Quantity
E
K U
E
Ein
Eout
2 main types of energy kinetic and potential
Energy units: 1 joule = 1 J = 1 kg m2/s2 = 1 N m for both types.
Gravitational Potential Energy
This is valid for any frictionless surfac
Chapter 9 Moment and Impulse Momentum is a vector quantity
kg m/s or N s.
t2
px
p2 x
p1x
t1
Fx (t )dt
The area under the impulse graph Jx= Delta P
Definition: "impulse" Jx
t2
Fx (t ) dt
t1
p fx
Note F avg = Jx / Dt For these probs.
pix p f
Chapter 2 Kinematics: The mathematics of Motion
This denotes positive and negative values on a graph. Interpreting position/time graphs
vs sf
rise run
s t
sf tf
si ti
si
vs t (uniform motion)
When the values are positive they indicate distan
Chapter 5 Equilibrium An object on which the net force is zero is said to be in equilibrium. The object might be at rest in static equilibrium Or might be moving in a straight line with constant velocity in dynamic equilibrium. Both of these conditio
Chapter 6 - Motion in 2 dimensions. Position and velocity
r x^ r1 r1xi^ r1 y ^ x1i^ y1 ^ ; v j j i avg t t ^ r2 x2i y2 ^ ; j r dr r r2 r1 xi^ y ^ ; v lim0 t dt j t
y^ j; t dx ^ dy ^ i j vxi^ v y ^; j dt dt
vx v
dx dt
v cos ; v y
vx 2