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Ch10.3 & 11: Forces and Newton’s Laws
We will be studying many things in the force unit (which actually covers
chapter 10.3 and chapter 11 in the book):
 Balanced and unbalanced forces
 Friction and air resistance
 Newton’s Three Laws of Motion
 Newton’s Law of Gravity
 Applications for these laws in linear motion
 Free Body Diagrams
 Vectors
There are two parts to assessing this unit. One will be some kind of objective
paper and pencil test over the material. There will be multiple choice, matching,
diagrams, drawings etc. including some physics problems for you to interpret, solve
and explain.
The second part is part of the slow car project, where you build a car, take
some baseline data and then modify the car outside of class to run as slowly as
possible without stopping. You will be graded on the modifications, the “slowness”
and the analysis of motion, which will include topics from Ch 10 (speed, velocity and
acceleration), Ch 11 (forces) and Ch 12 (energy).
Vocab checklist
+ if you’re an expert (can explain to someone else)
 if you’ve heard of it (and know a little)
0 if you’ve never heard of it
_____ force
_____
_____ net force
_____
_____ balanced force
_____
_____ unbalanced force
_____
_____ friction
_____
_____ static friction
_____
_____ kinetic friction
_____
_____ rolling friction
_____
_____ sliding friction
_____
_____ gravity
_____
_____ inertia
_____
_____ Newtons
_____
_____ weight
_____
_____ free fall
_____
_____ terminal velocity
_____
_____ action force
_____
_____ reaction force
_____
_____ force pair
_____
_____ g
_____
_____ Newton’s 1st Law
_____
_____ Newton’s 2nd Law
_____
_____ Law of Universal Gravity _____
_____ Newton’s 3rd Law
_____
_____ vector
_____
_____ resultant
_____
_____ normal
_____
Learning Targets (Skills)
_____ Discuss whether friction is good or bad in a given situation (10.3)
_____ Describe ways to increase or decrease friction (10.3)
_____ Recognize that a net force is the sum of all forces acting on an object (10.3)
_____ Recognize that unbalanced forces cause accelerations (changes in motion)
(10.3)
_____ Recognize that an object experiencing balanced forces may be at rest or moving
with a constant velocity (10.3)
_____ State all three of Newton’s Laws of Motion (11.1, 11.3)
_____ Apply Newton’s Laws to explain a variety of real life examples of force and
motion (be able to do this with and without friction as a factor) (11.1,
11.3)
_____ Describe the relationship between inertia and mass (11.1)
_____ Use Newton’s Second Law in problem solving situations (11.1)
_____ Recognize that all forces exist as pairs (11.3)
_____ Recognize that action-reaction pairs act on different objects at the same time
(11.3)
_____ Identify that action-reaction pairs act in opposite directions with equal strength
(11.3)
_____ Differentiate between mass and weight (11.2)
_____ Given mass, calculate weight (11.2)
_____ Explain the concept of free fall, with examples (11.2)
_____ Represent vector quantities in graphic form, using arrows (in class)
_____ Add vector quantities together (in class)
_____ Draw/interpret force diagrams (free body diagrams) for given examples of
motion (in class)