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Wednesday, September 27, 2017

q2 girl on pulley

  2.     (a)     (pulley wheel) at rest / in equilibrium / acceleration is zero                                B1
(b)     (i)      500 N force down and general shape correct                                            B1
angles correct (one angle labelled correctly)                                             B1
T1 and T2 directions labelled correctly                                                     B1

(ii)     Formulae correct (resolving or sin rule) / scale diagram drawn correctly
with scale given                                                                                     B1
T1 = 674 (N) allow 650 to 700 for scale diagram                                      A1

T2 = 766 (N) allow 740 to 790 for scale diagram                                      A1