Need help with physics :/ not understanding velocity

Physics
Tutor: None Selected Time limit: 1 Day

Dec 1st, 2015

Thank you for the opportunity to help you with your question!

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)velocity=gradient of the line

=(8/4-8)

=8/-4

=-2m/s

the car is decrease the velocity with time.


Please let me know if you need any clarification. I'm always happy to answer your questions.
Dec 1st, 2015

9)apply s=ut

s=7

t=4

U=s/t

u=7/4

u=1.75 m/s

Dec 1st, 2015

What about 9 and 10, don't work bout 11

Dec 1st, 2015


Dec 1st, 2015
cam00043.jpg

i have upload 10 th one also .if you have any question please feel to contact me,

Dec 1st, 2015

and also forgive me about my bad hand writing....

Dec 1st, 2015

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Dec 1st, 2015
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Dec 1st, 2015
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