1)(A) FALSE (B)True (C)True (D)False 2)(i)v=3t^2-12t+9 (ii)s=t^3-6t^2+9t-2 3)(i)(0,0) (ii) (A): equilibrium (B): zero Displacement 4)(i) using s=ut+o.5at^2 500=5x20 + 0.5a400 a = 2 (ii)v = 35 5)(i) hope you got that right, tension, Reaction, friction and weight (ii)25 (3)50cos30+R=10g solve for R (IV) NOT SURE 6)(i) 3.57 some thing like this therefore over (ii) air resistance 7)(i) R =1500 (ii) (A) 5900N (B)100300N (iii)121000-( 800000g x 1/80 + 33000) = - 0.0125 direction down the slope (iv) beta = 0.241 (3sf) 8)(i) Abs(AB) which use pythagoras (12,16) (ii) differentiat r = (3,2) + (6,8)t should get (6,8) therefore constant velocity (iii) cant remember ... (iv) finishes the race at the same time (v) differentiate get speed is (6,8t), sub t = 2 into it get (6, 16) pythag again get speed which is abt 17 bearing is 021 (vi) S1 - S2, horizontal displacement cancels out Verticle you get 4t^2 - 8t... differentiate this get 8t - 8, make this to 0 get maximum point get t = 1 sub bak in, get greatest distance is 4km
two questions, 1, do you think i'll lose a mark for constantly putting metres rather than kilometres? and secondly what was q5i) that we're all supposed to have got?!
two questions, 1, do you think i'll lose a mark for constantly putting metres rather than kilometres? and secondly what was q5i) that we're all supposed to have got?!
You might have lost one mark, but you'll only be penalised once for the mistake. As for q5(i), I believe that was a force diagram of a block being pulled by a string
You might have lost one mark, but you'll only be penalised once for the mistake. As for q5(i), I believe that was a force diagram of a block being pulled by a string
ahh thanks so much ) annoying about the metres kilometres thing if the maths is right though...its a maths test not a reading test -_- same with the comprehension in c4, wheres the fricking algebra in english a level?! but thanks sorry for the rant :P x