## Episode 208: Preparation for drag forces

Teaching Guidance for 16-19

- Level Advanced

There is much opportunity for student investigation in this area.

You will also need to consider the depth of treatment you want to give the subject – whether or not your students will respond to a quantitative approach or if a qualitative appreciation of the ideas is sufficient.

#### Main aims of this topic

Students will:

- recognise and understand the terms up thrust, drag, lift, air resistance and terminal velocity
- understand that at terminal velocity the net force on the moving body is zero
- be able to explain the acceleration of a body up to terminal velocity in terms of the forces acting on the body

#### Prior knowledge

Students may have previously studied projectile motion, in which the effects of air resistance are ignored.

#### Where this leads

This topic has been considered without adopting a quantitative approach. Many of the ideas could be revisited in numerical problems once Newton’s second law of motion has been covered.