5 1-5 sino 300 mm 3x500 VGIA 15 C05K VA = -157 V = VA + O.S VA + 3300) 1.5 L. A motorcycle rider is doing a wheelie as shown without the rear wheel slipping. At the instant shown, the speed of point A is 15 ms towards the left, the acceleration of point A is 0ms 2,0=3s and 60s-2. Gravity points down. 41=3 = 400 mm VG = -15 +15 cali + Lssmaj (a) Determine the velocity of point G, VG = vazi+vGyi (4 marks). (b) Show that the acceleration of point G is given by ac = aczi+acyj=2.7 ms 2i-3.6ms-2j (4) marks). aA=0 06 = Dat La GIA GI = 0+2 + 0*r S (c) Complete the free-body diagram of the combined 200-kg mass without the rear wheel as shown to determine the magnitude of the torque applied to the rear wheel at A. Treat the combined mass as a rigid body with centre of gravity at G (8 marks). 1.2 0.5 P=FV=Mn (d) Given that the radius of the wheel is 250 mm, determine the power applied to the rear wheel at A (4 marks)