You are a professional witness in a lawsuit. What do you tell the judge? What do
ID: 1283337 • Letter: Y
Question
You are a professional witness in a lawsuit. What do you tell
the judge? What do you tell the Physicist (Read the following scenario.)
1) The Judge needs terms that are easy to understand.
You need to include some "real world" examples to drive home your answer.
The Judge needs to see concepts of momentum exchange and a final answer for change in
speed for the bus in mph.
2) The Physicist needs to see calculations for momentum exchange
and a final answer for change in velocity for the bus in m/s.
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].
Explanation / Answer
Key factor is ice. No friction allows impact to transfer completely and freely to the small van and it takes all the gains just as in bumping while drafting in race car(stockers)
by bumbing with no friction, it is a transfer of energy and speed from the rear vehicle and not a collision att all to the rear vehicle.
you need to look up drafting and bumping physics in NASCAR.
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