questions below

1. A lorry is travelling along a straight horizontal road ABC with constant acceleration. The lorry passes point A with speed Elms1 and point B with speed 12ms'1. When the lorry reaches point C it is travelling with Speed 20ms'1. The distance from A to B is 100m and from B to C is 320m. a) Calculate the acceleration of the lorry (2) b) Calculate the distance from A to C 4. A cyclist is travelling in a straight line on a horizontal road at a constant speed of 7ms'l. There is an accident 40 m ahead, so the cyclist stops pedalling and applies the brakes. There is a total resistance to motion of SUN. The cyclist and bicycle have a combined mass of 70 kg Determine if the cyclist can stop before reaching the accident. Fully justify your answer. 3. A ball is thrown vertically downwards with speed 10ms" from the top of a building 50m high. At the same time as A begins to fall, another ball B is projected vertically upwards with speed 15ms ]. a) Modelling each ball as a particle, find how far ball B has travelled when both balls are the same distance from the ground. (5) b) Find the time of flight for ball B