anonymous
  • anonymous
hai guys, anyone who can help me.. i have a hard time figuring the answer of it because it seems the given is not correct but i don't know if my feeling is right. I had answered the same questions like stated below but this, why i cant get it.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
an object moves along a straight path at a speed v(t)=4t^2+3t+2 in m/s, where t=time in seconds. find the distance travelled after 4 seconds?
welshfella
  • welshfella
you need to find the distance so you have to integrate
anonymous
  • anonymous
the choices are: a) 112.56 m b) 135.68 m c) 117.33 m d) 125.75 m

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More answers

anonymous
  • anonymous
i already derive this v(t)=4t^2+3t+2 and plug in t=4
anonymous
  • anonymous
u have o integrate it
anonymous
  • anonymous
nd hten plug in t=4
welshfella
  • welshfella
can you integrate the expression
anonymous
  • anonymous
ok wait
anonymous
  • anonymous
whats the limit? 0 and 4?
anonymous
  • anonymous
write v in terms of dx/dt and then integrate
anonymous
  • anonymous
yes
welshfella
  • welshfella
|dw:1433684988494:dw|
anonymous
  • anonymous
oooh got it
anonymous
  • anonymous
the answer is 117.33
welshfella
  • welshfella
right!
anonymous
  • anonymous
i thought it must be derive
anonymous
  • anonymous
thats why i cant get the answer.
welshfella
  • welshfella
derivation will give you acceleration ( rate of change of velocity)
anonymous
  • anonymous
so questions like this must be intergrated?
welshfella
  • welshfella
if you are given velocity you integrate to get distance yes
welshfella
  • welshfella
- between the required limits
anonymous
  • anonymous
ok thanks a lot :-)

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