Term 1 Week 5 2020

Homework:

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

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 4 2020

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 (for week 5)
• Ex 4H, p.132-134, Circular Motion (this week)

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?