1. The problem statement, all variables and given/known data http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_w09_qp_41.pdf number 6III http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_w09_ms_41.pdf 2. Relevant equations s=ut+0.5at^2 3. The attempt at a solution Okay, the distance of P from ground is 3m and the distance of Q from ground is 7m, already calculated. However, im confused when the marking scheme says that the initial velocity for Q is -2m/s? why is that? 3 = 2tP + 5tP^2 initially i wrote this 7=2t+5t^2 for Q, the problem is why is the intial velocity is -2?