A. Space, Time and Motion Models

A1. Kinematics

A2. Forces (Carter)

A2. Momentum

A3. Work and Energy

A3. Work (Bruno)

A3. Power(Emir)

A3. Energy

Momentum = mass * velocity

Impulse

Elastic and Inelastic

Conservation of Momentum

Newtons [unit of measurement]

acceleration of 2 objects

types of energy include: Gravitational Potential Energy, Elastic Energy, Kinetic Energy, Interesting Energy or Thermal energy, and Work

equations

GPE= (mass) (gravitational field strength) (change in height)

EE= 1/2 (elasticity constant) (change in position)^2

KE= 1/2 (mass)(velocity)^2

Power=F*V

Friction

W = Equation

displacement, speed, initial velocity, final velocity, distnace traveled, avrage velocity, gravitational acceleration

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Momentum is a vector quantity - it has both a magnitude and a direction

W: Work , F: force, s: displacement

Static: no velocity, not moving

Dynamic/Kinetic: moving with constant velocity or accelerating

mu (sub) s: coefficient of static friction

engine power in motors

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it measures the amount of energy a system has

SITUATION: A SPRING IS BEING COMPRESSED IN ITS INITIAL STATE, THEN LAUNCHED TOWARDS THE AIR IN ITS FINAL STATE. (ASSUMING AIR RESISTANCE IS NOT NEGLIGIBLE)

final state: measures the amount of energy during that point of time. In this case, 2 bars for GPE, 1 for KE, and 1 for Interesting Energy.

mu (sub) d: coefficient of static friction

initial state: measures the amount of energy in this point of time, in this case, having 4 bars of elastic energy

acceleration of a system is the net force (in the direction of motion) divided by the total mass of a system

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the slope for the distance over time graph gives us the velocity of the object we are anlaysing. While the slope of the velocity vs time graph gives us the acceleration of the object

Slope: (nothing!)

Area bound by the line: change in velocity

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This means it can have a negative or a positive value

If an object travelling to the right has positive momentum, an object travelling to the left (in the opposite direction) has a negative momentum

The negative or positive directions are defined by the observer on a case-by-case basis

The SI unit for momentum is kg m s−1

the area of the velocithy vs time graph is the displacement, while the area of the distance vs time graph is nothing

interaction between two objects