M1. (a) (i) reaction and weight labelled B1 sensible positions and directions B1 2 (ii) mention of reaction contributing (‘providing’) centripetal force B1 providing rider moves fast enough weight will not exceed the required centripetal force B1 2 (b) (i) 1.6(1) B1 rad s–1 B1 2 (ii) 840 860 (N) – B1 1 (iii) for A R mg centripetal force or – – C1 for B mg + R = centripetal for A 1400 1500 (N) – A1 for B 240 270 (N) – A1 3 [10] M2. (a) attempt to use = mgh/t or P = Fv and v = s/t
M1. (a) (i) reaction and weight labelled B1 sensible positions and directions B1 2 (ii) mention of reaction contributing (‘providing’) centripetal force B1 providing rider moves fast enough weight will not exceed the required centripetal force B1 2 (b) (i) 1.6(1) B1 rad s–1 B1 2 (ii) 840 – 860 (N) B1 1 (iii) for A R – mg – centripetal force or C1 for B mg + R = centripetal for A 1400 – 1500 (N) A1 for B 240 – 270 (N) A1 3 [10] M2. (a) attempt to use = mgh/t or P = Fv and v = s/t
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