Thank you for the opportunity to help you with your question!
5)lets get the speed after collision as V,
then considering the momentum
6)velocity @ 2 second=0
7)@ point B
8)velocity=gradient of the line
the car is decrease the velocity with time.
What about 9 and 10, don't work bout 11
i have upload 10 th one also .if you have any question please feel to contact me,
and also forgive me about my bad hand writing....
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