Term 1 Week 5 2022

 Homework

• Act 8B Graphs of motion p.101 (last week)
• Act 8C Kinematics p.102 (last week)
• Ex 4E Kinematics p.115-117 (last week)
• Act 9A Vectors p.108-109 (last week)
• Ex 4A Vectors p.90-94 (last week)
• Act 12B Projectiles p.140-144 (last week)
• Ex 4F Projectiles p.119-124 (last week)
• Act 10A p.117-118 Forces (last week)
• Act 10B p.123-124 Forces (last week)
• Ex 4B p.97-104 Forces (last week)
• Ex 4G p.125-130 Torque
• Act 13A p.148-149 Circular Motion
• Ex 4H p.132-134 Circular Motion

Torque

𝝉 = F L⦜
𝝉: Torque (Nm)
F: applied Force (N)
L⦜: Length of lever at right angles to the applied force (m)


• Torque (Moments) in Level 2 Physics will involve Static Systems
• Therefore the Torques are balanced and the Forces are balanced - Newton's Laws of Motion apply to turning forces as well as linear forces
• PhET - Torque Balancing Act simulation
Bridge support forces moments


Torque (Moments anout a point)
Static (unmoving) systems will be used for this section. Therefore all forces, linear and turning, are balanced








Torque

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?