Remember to set up a positive direction and state directions of vectors 1. A car initially travelling at 15 km/h accelerates at 1 75 m/s' for 8 0 seconds. a) What displacement does the car travel during this time? (3marks) b) How fast is the car going at the end of the time interval? (3marks) 2. A car with an initial velocity of 20.0 m/s accelerates uniformly down a long hill. If it travels a distance of 675 m in 0.50 min, determine the car's final velocity. (4 marks) 3. A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and the acceleration as the ball is coming down. (1 mark) a) Both its velocity and its acceleration point upward b) Its velocity points downwards and its acceleration points upwards alanitu nointo um d) Both its velocity and its acceleration point downwards. 4. A man stands on a bridge 7.0 m above a river. He tosses a rock vertically upwards at 12 m/s. The rock sails upwards, reaches a maximum height and then returns downwards, splashing into the river a) What is the maximum height that that rock attains? (3 marks) b) How long does it take to reach its maximum height? (3 marks) c) How fast is the rock traveling upon impact in the river