Wednesday Lesson

Y11HW Summarize Chapter 10 - 1 Page. Prepare for Prac 10.1 on page 221 with book ruled up

We will look at Vector components and acceleration using Tracker. You can download it from R drive, science, yr10, physics. It will greatly assist in performing pracs


Turn vectors into scalar (projections) then back into vectors.
- Each V has projections Vxx and Vyy where x and y "Unit vectors along the axis"



Newtons Laws 1-2-3

N1 Straight line, constant velocity (Speed and Direction), if F = 0
Historical: Break with Archemedies and common sense.
Application: Cars thrown through the window

N2 Sum of Forces = Resultant Force = Mass x Acceleration. (on a body)
Historical: Invention of Mass a number to link Force (that can be felt) and acceleration (that can be seen)
Application: Anything that moves, Constant velocity means NET force is zero.
Types of Forces
Internal- Generated by a Field generated by a body at distance Force just dropped on to object. - Gravity
External - Generated by contact , two forces generated. In sum only add the forces acting on it. Strings and Friction

N3 Every force has an equal and opposite force. (in a system)
Historical: Invention of Momentum, Impulse fT or Ft, ease up or death.
Application: Collisions, Lethal force