Name: Physics 20 Unit C Assessment Assignment Version D Remember to use GRASP and show all of your work for every question! To earn full marks you need to: Write what is given and required Write the needed formulas and rearrange if necessary Substitute into the formulas and include units State your answer with correct sig digs - 720 marks Module 5: Developing Level (3 marks each) 1) What centripetal force is required to cause a 2500 kg car to travel around a 70 m diameter traffic circle ("roundabout") with a speed of 35 km/h? m = 2500kg 2r=70m v=35 km/h F=m F = 2500 x (35 x 1000) 2 x (192) r = 120) = 35m 3600 (7%) = (35x1000) mis 3600 F= 6751.5N F=6.810N 5x the Earth, wh 2) The Earth is 1.49x101 m from the Sun. If the Earth requires 365.25 days to go once around the Sun, what is the centripetal force on the Earth? T= 365.25=1365.25 x 24 x 3600) sec T=245 V v=251 T F= m m of earth = 5.98x1024 m F=m: (2x). 1 22 F = 3.526x10 N F= 45 5.9710.1.4910" (365.2524x3600)