3.2 Non-uniform motion

1 show a qualitative understanding of frictional forces and viscous/drag forces including air resistance
(no treatment of the coefficients of friction and viscosity is required, and a simple model of drag force
increasing as speed increases is sufficient)
2 describe and explain qualitatively the motion of objects in a uniform gravitational field with air
resistance
3 understand that objects moving against a resistive force may reach a terminal (constant) velocity