Key Questions Save your answers to the Key Questions. When you have completed the unit, submit them to ILC for marking. (18 marks) 1. A ladybug with a velocity of 10.0 mm/s [W) crawls on a chair that is being pulled [50' N of W] at 40.0 mm/s. What is the velocity of the ladybug, relative to the ground? (9 marks) 2 . An airplane is flying to a city due west from its current location. If there is a slight wind blowing to the southwest, in what direction must the plane head (that is, in what direction must it point)? Explain your answer using a diagram. (3 marks)n 2 Physics SPHAU-B 6. A child sitting in a tree throws his apple core from where he is perched (4.0 m high) with a velocity of 5.0 m/s [350 above the horizontal], and it hits the ground right next to his friend. a) How long is it before the apple core hits the ground? (3 marks) b) How far from the base of the tree will the apple core land? (3 marks) c) What is the velocity of the apple core on impact? (4 marks)13. Sometimes, road surfaces have banked curves. Use an FBD to explain how this helps cars to make turns more safely. (3 marks) 14. A bus passenger has her laptop sitting on the flat seat beside her as the bus, travelling at 10.0 m/s, goes around a turn with a radius of 25.0 m. What minimum coefficient of static friction is necessary to keep the laptop from sliding? (5 marks)11. Efficient and safe transportation depends on friction being either minimized or maximized, as necessary. (5 marks) Using research, find a) one example in which friction is maximized to aid in transportation. b) one example in which friction is minimized to aid in transportation. For each situation, explain how the friction is maximized/minimized and why this is necessary or beneficial. c) Give at least one source that you used for your research