Force 4.1

Gravitational Force(weight)

Summary: Weight is also known as a gravitational force. It is the amount of force you put on the earth.

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Force 4.4 Vector Addition

Vector Addition

Summary: Forces acting against each other can be calculated using vector addition. For example 3N to the right and 4N to the left would result in a net force of 1N to the left.

Links:

Addition of Forces

Force Vector Addition

How to use Vector Addition

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Force 4.1

What is a Newton

Summary:

A newton is a unit of force.  Specifically it would be how much force is required to cause an acceleration of 1 m/s^2 in a 1 kg object. 

Links:

This is how i learn

This is the best place for learning

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Motion 2.3

Acceleration 

Summary: 

Acceleration is the rate at when velocity changes, as a vector quantity it must be stated with both the magnitude and direction. Acceleration occurs anytime an object's speed increases, decreases or if the direction of the motion changes. 

Links: 

I love EGGceleration!

Motion 3.1 Velocity vs. Time graphs

Velocity vs. Time graphs

Velocity vs. time graphs show the velocity of an object at any time. The time is always on the x-axis and the velocity is always on the y-axis. If the line has a slope of 0 on the graph that means that the object is traveling at a constant velocity, if the line has a positive slope that means that the object is travelling at a positive acceleration and if the line has a negative slope that means that the object is travelling at a negative acceleration. If the line is in the positive section of the graph the object is travelling in a positive direction if the line is in the negative section of the graph the object is travelling in a negative direction.

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Meaning of shape for a Velocity vs. Time graph

Meaning of slope on a Velocity vs. Time graph

Pictures:

You can see in this velocity vs time graph that the object is travelling
at a constant velocity of 10 m/s in a positive direction.

You can see in this velocity vs time graph that the object is travelling
at a constant positive acceleration in a positive directio

Videos

Motion 3.1

Motion 3.1 Velocity vs. Time Graphs

Velocity vs. Time graphs shows the velocity at a certain time. A positive slope shows a positive acceleration and a negative slope shows a negative acceleration. A slope of zero shows constant velocity. If the line is in Quadrant IV it is moving in a negative direction and if the line is in Quadrant I it is moving in a positive direction. If the line is moving toward 0, it is slowing down. If the line is moving away 0, it is speeding up.

Meaning of the slope

Features of VT Graph

VT graph vs PT graph

Helpful videos:

Motion 1.2 Motion Diagrams

Motion Diagrams

Motion diagrams show how far an object moves in a period of time. It is a series of dots, and each dot represents where the object is in one unit of time. The longer the line between the dots is, the more velocity it had.

This shows what Motion Diagrams are.

This shows you how to make Motion Diagrams