especially the physicist one, the physicist needs to see calculations for moment
ID: 1447788 • Letter: E
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especially the physicist one, the physicist needs to see calculations for momentum exchange and a final answer for change in velocity for the bus in m/s M MyLab & Mastering Sapling Learning | E MOMENTUM LAB ostLab Scenario You are a professional witness in a lawsuit. What do you tell the judge? What do you tell the Physicist (Read the following scenario. You are on an RTD Stretch Bus (the long busses with the accordion in the middle. (This is called an articulating bus.)) The bus is fully loaded with fuel and people. You are traveling at 30 [mph] when a mini-Van in front of the bus pulls in front of the bus as it travels in a similar direction; the van is traveling 20 [mph]- The bus driver slams on the brakes, but there is black ice so the bus gracefully slides right into the van sending the van flying ahead. Three passengers riding the public transit bus, upon realizing their opportunity to make some quick cash, start crying of back and neck pain. Mass of bus + passengers fuel is about 66,600 [lb] or 30,200 [kg]. Mass of van is about 2,000 [kg]. Please Note: A few students have contacted me and said that I made Bere are my conversion notes: 66600 4.4492454 /9.8 30236.709 #11b] * 4.4492454[N] / 1 [1b] / 9.8[m/s/s) > kg an error converting from pounds to kilograms. 66600 0.454 30236.400 #11b] * 0.454 (kg] / 1 [1b] > kg Forensics estimates from the bending of the light-pole that the van was moving at an uninhibited speed of about 35 [mph] when it hit the pole 28Explanation / Answer
momnetum is conserved
initial momentum = final momentum
30,200( 30 ) +2000( 20),= 30,200 (v) + 2000( 35)
90,6000 + 40000= 70000 + 30,200 v
v ( speed of bus after collision) = 29 mph = 12.9642 m/s
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