Complementary descriptions
Teaching Guidance
for 14-16
Move between descriptions
Students ought to be developing a repertoire of descriptions for objects in motion, and relating changes in these motions to the forces acting on the objects.
Measures of motion:
Δ energy in the kinetic store = 12mv 2
→p = m × →v
Changing the motion:
Δ →p = →F × Δ t
Δ (energy in kinetic store) = force × distance
→a = →Fmass
Teacher Tip: Practice translating from one representation to another, using the different measures of motion and changes in motion (momentum, mass, acceleration), and using different modes of representation for these different quantities (verbal, algebraic, graphical, and diagrammatic).
