Describe, qualitatively, motion in a circular path due to a force perpendicular to the motion as: (a) speed increases if force increases, with mass and radius constant (b) radius decreases if force increases, with mass and speed constant (c) an increased mass requires an increased force to keep speed and radius constant (F = mv²/r is not required)

Understand that a scalar quantity has magnitude (size) only and that a vector quantity has magnitude and direction

Define resultant force as the change in momentum per unit time; recall and use the equation resultant force = change in momentum / time taken, F = Δp/Δt