Term 1 Week 5 2017

Homework

• Vectors Worksheet
• Start Circular Motion Worksheet

Vectors

• A vector has a size - how big is it?
• A vector has a direction - which way is it going?
• When adding vectors add head to tail
• When finding a change remember

Δv = vf - vi

Using Vectors in Projectile 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

Term 1 Week 4 2017

Homework
Projectile Motion Worksheet

Use Trigonometry to find your Vertical initial velocity and Horizontal initial velocity component vectors

Projectile Motion follows a Parabolic Path that is Symmetrical about the highest point

Vertical Axis - downward acceleration at g, use kinematic equations

Horizontal Axis - no acceleration due to forces being balanced, use v =d/t

Time, t, is the only scalar (not a vector) so ties both Vertical and Horizontal together

The Vertical and Horizontal Motions are otherwise independant

Beautiful Trigonometry - Nimberphile

Free Fall

Projectile Motion

Term 1 Week 3 2017

Fundamental Units and Compound Units

All other units used in science are made up of a combination of the fundamental units. 

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

Homework:

Equations of Motion worksheet