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4] For this question, you will be basing your answers on the ride in the following video: Nothing but Net httgszgfwwwyoutube.comfwatch?v=1VHJgC3P5Mk To simplify the situation, let's say the rider's energy is absorbed only by the four stretchy elastics at each corner of the net. What is the k value of each cord (assume they are all equal}? If the ride is 30 m tall, and the net extends 1.5 meters at most. You will assume the rider's mass. Fields 5] Old fashioned bumper cars are powered by a charged ceiling and floor. A pole on the bumper car connects these two charged surfaces to give the car current to run. The difference in voltage between the plates is typically around 48 V. Estimate the height difference between the ceiling and floor. When radon in the ground decays it releases an alpha particle. Assuming the ceiling is negatively charged, the alpha particle could be accelerated towards the ceiling. It is not good for people to he hit with fast moving alpha particles. Mathematically show if this is something we need to be concerned about. Note: Think about the height ofo person and how fast the particie could be moving when it hits them. is it moving at a slow drift, or an appreciable speed of iight iike nucieor radiation? Energy and Momentum 3) a) Two bumper cars travel towards each other as pictured below. The blue one is 635 kg and travels at 5.34 m/s, and the green one is 534 kg and travels at 6.37 m/s. After the collision the green car is traveling at 4.30 m/s. What is the magnitude and direction of the velocity of the blue car? 47 62 60 b) Is this collision elastic or inelastic? Describe mathematically and conceptually