Chapter 6-Work + kinetic Energy.
Conservation 0*
Energy Work
displacement (distana)
Cannot be created or destroyed only Convereed from one energy to another (total energy remains the same)
complete work on a particle equals the kinetic energy.
L↳ displacement=how far out something is
L↳ Ex). passengar moves to the back of a plane (change in position)
→ object nås been moved. or displaced
magnitude
→ Magitude = distance or quantity 4 Ex). 1x1 + absolut relative direction or size that an object moves..
Work
S displacement of magnitude 14 object Changes position in an absolute relative direction
Fconstant force in same direction as dis placument
F = F cos W= Fs (Straight line) (parallel to s)
F₁=Fsin (perpendicular to s)
Work & Kinetic Energy
(2)
AB
JØ Oto 180
Scalar Product (dot produce)
tail to tail
imaginide
times Component of B in the direction of
Work as a Scalar produce
Example #1a
Chivens
210 NF
18m=5
$=30
Scalar product of Vectors F+S
Physics
WFs cos
(210N) (18m) COS (30)
Example #70
Givens
3.3 x 1035
Fx=160 N. 3x=4m.
Fy=-ADN Sy=11m
Physics
AB=A,By Ay By +
Az Ba
Work + kinetic Energy
y
(160N) (14m) + (-4ON) Lilm)
1.8 x 10J
Positive, Negative, or zero Or
0°-90° = positive direction (Samection 90°-180° = negative direction lopposite) direction 90°= zero (perpendicular)"
Example #2
Givens-W
T
Physics
T
f=5000N T
Ø=36.9°
8:20m
all in cos
(5000N) (20m) cos 36.90 80,000 W.m. .or.
Givenswg.
3500N F 20 ms
0=180° or-1.
80k5
Physics
(3500 W) (20m)
COS180
-70k5
or-1