4. A careless driver forgets to set the emergency brakes of their vehicle. The vehicle starts from rest and rolls 68 m along a surface inclined 35 to the horizontal, as shown in the diagram below. The cliff is 150 m high. d = 68 m 350 h = 150 m R If friction is negligible, how far (R) from the base of the cliff will the truck hit level ground? (10 marks) 5. An aircraft with an airspeed of 250 km/h heads 190 east of north. When it encounters a wind, its velocity relative to the ground becomes 260 km/h due north. a) Write the vector equation for the velocity of the wind relative to the ground. (1 mark) b) Draw and label the vector diagram which represents the vector equation from part (a). (3 marks) c) What is the velocity of the wind relative to the ground