1. Air resistance and Terminal velocity
(j) describe qualitatively the motion of bodies falling in a uniform gravitational field with air resistance
(k) describe and explain motion due to a uniform velocity in one direction and a uniform acceleration in a perpendicular direction.

2. Falling
Why does a piece of paper fall more slowly under gravity than board marker if the acceleration due to gravity is the same for all objects?
If an object is falling through the air with constant velocity, what can you say about the net force on the object?
How do the forces on an object vary as the object accelerates from rest?

3. Terminal Velocity Body released from restmg
Drag force
Body released
from rest
Forces on body during acceleration
Forces on body at
terminal velocity

4. To do
Try p 106 q22 & 23

5. Upthrust and downthrust
An aeroplane is flying at constant velocity (and therefore at constant height). The net force on the aeroplane must be zero. How are the forces balanced? The forward thrust provided by the engines balances the backward drag of air resistance; the downward weight of the plane is balanced by the upward lift on the wings
Downward force to increase grip on track

6. Projectiles questions
P43 q10,11,12
P106 q 24