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542420
Concept Map Chap. 1-4
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Hanna Engle Megan Fisher Zachary Bartman Alissa Barwinski Mikayla Bond Nick Bucci Joseph Dunphy Serena Foor
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hannaengle421
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Resource summary
Concept Map Chap. 1-4
Chapter 1
Scientific Notation
Shorthand to show very large or very small numbers
Significant Figures
4 rules for Significant figures
Dimension Analysis
Length = L
Time = T
Mass = M
Formulas need to be balanced properly
Vectors
Lines and arrows that show the magnitude and direction of an object
Can be added together
Use tip-to-tail method
Chapter 2
Newton's Laws of Motion
Third Law
For every action there is an equal and opposite reaction.
Second Law
F=ma
a = F/m
First Law
An object at rest will remain at rest while an object in motion tends to stay in motion
Motion
Instantaneous Acceleration
Position, Velocity, and Acceleration
The position ( r ) of an object describes its location relative to some origin or other reference point.
Δr = r (final) - r (initial)
Velocity is a vector that measures how fast and what direction an object is moving
Velocity is found from change in distance divided by the change in time
Acceleration is found from change in velocity divided by change in time.
Instantaneous Velocity
Chapter 3
Constant Acceleration and Velocity
Δv = v (final) - v (initial)
a = Δv / Δt
vf = vi+ aΔt (finding final velocity)
∆x = v (initial) ∆t + 1/2a ∆t^2 (finding distance traveled)
Normal Force
Always perpendicular to the place of contact
Free Body Diagrams
Diagram that shows magnitude and direction of forces acting on an object
All forces come from interactions
Forces
∑Fy = N + (-mg)
Friction
Kinetic. Analyzing motion in the presence of friction
Static Friction. Force acting on object
F = u * N
Free Fall
Motion of a dropped object
Tension forces
Using pulleys to redirect a force
cables / ropes/ pulleys
mg = mass times gravity
Chapter 4
Statics and Equilibrium
If an object is at equilibrium the net force acting on the object is 0
Sum of Fx = F1 + F2+ F3 + K ... = 0
Sum of Fy = F1 + F2 + F3 ... = 0
Deals with problems where both the velocity and acceleration are 0
Objects said to be in "transitional equilibrium"
Friction
Involved surfaces are not slipping (moving) with each other
Projectile Motion
Acceleration in both x and y directions are constant
a (x) = 0
a (y) = - g
To find trajectory you need both x and y components of the motion taken by the object
Newton's 2nd Law
Forces : Gravity, Normal Force, Push Force, and Static Friction
Free Body Diagram
Total force equal to the quotient of Normal force and Mass
Weight is directed downward and Normal Force is directed upwards
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