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