MOON'S WORLD
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Buggy Lab
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Cart on Ramp Lab
Unit 2
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Unbalanced Forces lab
Unit 3
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Whirly Durly Lab
Content
Unit 1- Kinematics
Unit 2- Forces
Unit 3-circular motion
Unit 4- Energy
Unit 5- Momentum
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Unit 1
Physics of Something
Newton's First Law
Objects remain at rest of uniform motion unless met by an external, unbalanced force
Fnet = 0 when v=0 or v=constant/equilibrium
Newton's Second Law
Acceleration is proportional to net force and inversely proportional to mass
Fnet =ma
Newton's Third Law
Every action has a reaction force with the same magnitude but from the opposite direction
System Schemas
identifies interactions between objects and the type of force involved
forces that are not part of the system but still exists do not need to be labeled
Force Diagrams
identifies the force acting on the object of interest (black point)
arrow length = magnitude, direction = force direction, indicate angles when needed
always draw xy planes to include as much arrows on the x/y direction as possible (to make life easier)
always indicate the object that is exerting force: Fx by a on b
Force Calculations and Solving Force problems
add forces in the same direction, subtract forces in the opposite direction
break down an angled force into its x/y components and do addition/subtraction independently
make a x/y table to separate forces of different directions and calculate Fnet separately
Methods for problem solving:
highlight identified forces, numbers, objects and what we are finding in the question
draw system schema and force diagrams for every object needed
draw x/y table with net force
identify variable we are finding and use Newton's laws of motion to solve it
Relating Representations of Motion and Force Models
common motion words
accelerate
drop
push
hang
move to x direction
relate motion to force diagrams
acceleration- mind directions of acceleration as it might be actually slowing the object down if its in the opposite direction
drop- normally in free fall questions, so the only force acting on the object is Fg by E on X
push- applied force, mind directions
hang- tension, force acts in the direction of the string
move to x direction- applied force to x direction
Solving Problems with forces and motion
similar methods as discussed previously on this page
ALWAYS draw x/y planes and identify forces in the correct direction
apply kinematic equations when x/v/a are involved
when things are on an angled surface, apply Pythagorean theorem and SOHCAHTOA to break down the components first before solving for forces
Home
Labs
Unit 1
>
Buggy Lab
Cart on a Ramp Lab
Cart on Ramp Lab
Unit 2
>
Unbalanced Forces lab
Unit 3
>
Whirly Durly Lab
Content
Unit 1- Kinematics
Unit 2- Forces
Unit 3-circular motion
Unit 4- Energy
Unit 5- Momentum
About
Contact
Unit 1
Physics of Something