Term 1 Week 4 2019

Homework:

• Ex 4E, p.115-117 Kinematics (from last week)
• Ex 4F, p.119-124 Projectile Motion (from last week)
• Ex 4A, p.90-94 Vectors (from last week)
• Ex 4B, p.97-104 Forces (from last week)
• Ex 4H, p.132-134, Circular Motion

Circular Motion

• Velocity is always at a tangent to the circle. Even if the speed remains constant, the velocity is changing because it is accelerating.

vc = 2𝝿r/T

• Centrapetal Acceleration is always toward the centre of the circle.
• ac = mv2/r
• Centapetal Force is the Net Force, and is also always towards the centre of the circle.

Fc = mv2/r

Uniform Circular Motion

Circular Motion

PHet Application on Circular Motion

Derivation of Centripetal Acceleration

Centrapetal vs Centrafugal

Faking Gravity

What is the Coriolis Effect?

Term 1 Week 3 2019

Homework:

• Ex 4E, p.115-117 Kinematics (from last week)
• Ex 4F, p.119-124 Projectile Motion
• Ex 4A, p.90-94 Vectors
• Ex 4B, p.97-104 Forces

Projectile Motion

See Projectile Motion Videos at the bottom of the Mechanics Webpage - link here

PhET - Projectile Motion  - link here

Projectile Motion - Khan Academy

Horizontal & Vertical Vectors in Projectile Motion

Introduction to Projectile Motion

Vectors

A vector has a magnitude (size) and direction

Vector Addition

• Always add Head to Tail
• It does not matter which order you add vectors

Vectors Physics, Basic Introduction, Head to Tail Graphical Method of Vector Addition & Subtraction

Adding & Subtracting Vectors

What is a Vector?

Forces

Mass on a Slope

Drawing a Free Body Diagram

Net Force - PhET Application - link here

What is a Force?

What Forces are Acting on You?

Best Film on Newton's Third Law Ever

What is Gravity

The Difference Between Mass & Weight

Misconception About Falling Objects

Term 1 Week 2 2019

Homework:

• Ex 4E, p.115-117, Kinematic Equations

Kinematic Equations

Only used when an object is accelerating

vf = vi + at	← missing d
vf2 = vi2 + 2ad	← missing t
d = vit + ½at2	← missing vf
d = (vi + vf)t/2	← missing a

Choose the kinematic equation based on:

• what quantities you are given
• what quantity is asked for
• what quantity is not involved

 

Using Kinematic Equations

Algebra Review - Manipulating Equations in Physics