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If car crashes, coming to a complete stop, how fast will an object fly out of the car?
In a completely theoretical environment, lets say a 1000 kg car is moving at 40 km/hr with a board on the top of the car weighing 10 kg. If the car crashes, coming to a complete stop, how fast does the board fly off the car? I initially thought obviously 40 km/hr but the conversation of momentum states-
(m+m2)v=mv+m2v2 which means gives 40400=(1000)(0)+10(v2) which gives us a v2 of 4040 km/hr which is way too fast. What went wrong?
2 Answers
- oubaasLv 76 years ago
hahahah miracles do not exist ....Table has its own momentum I = mt*Vt which is conserved , since it can frictionlessly slide away from the stopped car at the same speed it had before impact ...
the table speed in the frame of soil is 40 km/h constant , while the table speed in the frame of car is variable from 0 up to 40 km/h
