pratyush5
  • pratyush5
A body looses half of its velocity while penetrating 3 cm into a wooden block, then how much will it penetrate more before finally coming to rest. Please explain
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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pratyush5
  • pratyush5
@ashwinjohn3 @yrelhan4 @uri
pratyush5
  • pratyush5
i have got the answer but i want to know a proper method
yrelhan4
  • yrelhan4
newtons law of motion will do it for you!

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More answers

pratyush5
  • pratyush5
i used v^2 - u^2 = 2as
pratyush5
  • pratyush5
i just need to know what should i take for acceleration or should i ignore it
anonymous
  • anonymous
u must find the acceleration dude....
anonymous
  • anonymous
Ok....Acceleration is negative since it is slowing down.....
pratyush5
  • pratyush5
ya sure
anonymous
  • anonymous
here v=u/2,and use the equation v^2=u^2-2as
anonymous
  • anonymous
then u will get accelration
anonymous
  • anonymous
then finally equate v=0,a=obtained from above and find s!!!
anonymous
  • anonymous
since here the question asked is "how much more will it penetrate" initial velocity=u/2...
pratyush5
  • pratyush5
i am getting a= -u^2/8
pratyush5
  • pratyush5
is dat right ?
yrelhan4
  • yrelhan4
yup..
anonymous
  • anonymous
yup....
pratyush5
  • pratyush5
there fore the equation for finding "s" should be|dw:1359144797548:dw| right
pratyush5
  • pratyush5
so i get s=1 cm
anonymous
  • anonymous
i got that too...
pratyush5
  • pratyush5
correection |dw:1359144893116:dw|
pratyush5
  • pratyush5
thnku all
anonymous
  • anonymous
your welcome....
yrelhan4
  • yrelhan4
yes.. i was wondering whats wrong. so s=4cm. it penetrates 1cm more.

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