Q1: A 828 kg racing car travels at a uniform speed around a circular racetrack of radius 88.7 m in 14.4 s. What is the centripetal force acting on the car provided by the friction force between the tires of the car and the road? Give your answer in units of kilo-Newton (kN), however do not include any units in your answer. Type in only a numerical answer (do not include the "kN"). Otherwise, your answer will be counted as incorrect.

____

Q2: John throws a rock from a bridge 16.7 m above water at an initial speed of 16.3 m/s. If we use the energy considerations and assume negligible air resistance, with what speed rock will strike the water's surface?

_____