PHYS 1020 Lecture Notes - Circular Motion

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26 Nov 2011
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Course
WEDNESDAY, OCT 12th!
QUIZ #2- Weds OCT 19th! LAST DAY
Mastering Physics due TUES OCT 18th! – 11:55PM
Experiment # 2 STARTS OCT(24 – 28!) :D
QUIZ 2 REQUIREMENTS!!
2D Kinematics SG.2
Uniform circular motion SG.2
Force & Newton’s Laws SG.3
Inclined Planes SG.3
PRETEST 2(ONLINE) Min 60%!!
FORCES & MOTION:
Kinetmatics – description of motion (1-D,2-D)
What causes motion?
- Motion needs no “CAUSE”
- Objects in uniform motion require no “cause” for their motion. Only changes in
motion- acceleration- require a cause: A FORCE.
Dynamics: relationship between forces and notion.
Force- push or pull that has potential to change objects motion.
SI unit : NEWTONS 1Kgxm/s2
Vector, F
Types of forces: acts when object in contact
Acts parallel to constant surface
Acts opposite to direction of motion
Static or kinetic
-normal force (Fn)
Acts when object is contact
Acts perpendicular to surface
Gravity (Fg = mg)
Attractive force between 2 objects (Weight)
Acts downwards
Tension (T)
-pulling force with rope or chain.
Contact forces: friction, tension, normal
NON-contact forces:gravity, magnetic
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