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Presentation transcript:

Put this list in order of difficulty to stop: Golf ball Rugby ball bowling ball Cricket ball Football What makes one ball more difficult to stop than another?

Baseline (Aiming for 4): Apply the equation p=mv to find the momentum, velocity and mass of an object. Further (Aiming for 6): Describe how the principal of conservation of momentum can be used to find the velocities of objects. Challenge (Aiming for 8): Apply the principals of conservation of momentum to a range of calculations involving the velocities of objects.

Exam question answers M1. (a) (i) 10800 allow 1 mark for correct substitution i.e. 900 × 12 2 (ii) arrow pointing towards the left allow anywhere on the diagram or at bottom of the page 1 (b) zero accept 0 / none / nothing velocity is zero accept speed for velocity accept stopped / not moving accept a calculation i.e. 900 × 0 = 0 [5]