Week 1 Worksheet

are legitimate mathematica operatlons (@) - A- (B é) (b) (1 3) xC; ) A+ (BxC); d A x (B X C) @ A x (B C)" In each case, give the reason for your answer. Q1.25 @) IfA-B = 0, does it necessarily follow that A = 0 or B = 07 Explain. (b) If A X B = 0, does it necessarily follow that A = 0or B = 0? Explain. Q2.2 The black dots at the top of Fig. Q2.2 represent a series of high-speed photographs of an insect flying in a straight line from left to right (in the positive x-direction). Which of the graphs in Fig. Q2.2 most plausibly depicts this insect’s motion? Figure €2.2 L) L L] . -~ . v, a, x v, v, ; K \/ K t < t t 1 t 7] ol ol ol o|