You may detach this page. Gravitational acceleration on Earth g = 9.8 ms -2 Speed of light in a vacuum C = 3.00 x 108 ms-1 Refractive index of air nair = 1.000 Vfs - Vis ac = Ufs = Vis + ast t 1 S = Vist+-at2 Ufs = Vis + 2ass Fnet = ma T = FXr F = -kx my2 F = = mrw 2 r v = rw p = mv Ap = Ft = Pf - Pi W = F 'S W P = - t Ek = =mv2 Ep = mgh E = -kx2 v = af Vw y = Asin 2nift + - 2nx fobs = Is V F Us fobs = fs Vw + Vobs fB = If1 - f2l na = d sin 0 Vw (n+ - )1 = d sine n, sin 01 = n2 sin 02 sin Oc = n1 1 1 hi -di -+ di M = ho doQuestion 2 (5 Marks) A smooth cube, of mass 50 g, slides with an initial velocity of 5 m/s up a slope as shown in the diagram below. The ramp is 120 cm high; friction can be ignored. V=5mis / Ground level a) Sketch a free body diagram for the situation where the cube is moving up the slope. [2] b) How long does it take the cube to travel to the top of the slope given the angle 0 is 20? [2] The same cube is now travelling on a smooth horizontal surface with a velocity of 4 m/s. It then projected horizontally and hits the ground as shown in the diagram below. V=4mls r Ground level c) How far from the bottom of the ramp does the smooth cube hit the ground level? [1]