Term 1 Week 7 2018

Homework:

• Ex 4B Forces, p. 94-104
• Ex 4H Circular Motion, p. 132-134
• Ex 4E Kinematics, p. 115-117 (Revision)
• Ex 4D Momentum (Collisions) p. 109-112
• Ex 4C Impulse (Change in Momentum) p. 105-107

Momentum

In the absence of external forces the total momentum is always conserved

PhET Momentum Collisions Lab - Link

Conservation of Momentum

Stacked Ball Drop

Term 1 Week 6 2018

Homework:

• Ex 4B Forces, p. 94-104
• Ex 4H Circular Motion, p. 132-134

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

https://phet.colorado.edu/en/simulation/legacy/rotation - link

Derivation of Centripetal Acceleration

Centrapetal vs Centrafugal

Faking Gravity

What is the Coriolis Effect?