# Need help with physics :/ not understanding velocity

Anonymous
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### Question Description

School: University of Virginia

5)lets get the speed after collision as V,

then considering the  momentum

75*5.5+100*7.5=175*V

simplify

412.5+750=175v

v=6.64 m/s

6)velocity @ 2 second=0

7)@ point B

=(8/4-8)

=8/-4

=-2m/s

the car is decrease the velocity with time.

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Anonymous
Thanks, good work

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