anonymous
  • anonymous
Object A has of mass 7.20 kilograms, and object B has a mass of 5.75 kilograms. The two objects move along a straight line toward each other with velocities +2.00 meters/second and -1.30 meters/second respectively. What is the total kinetic energy of the objects after the collision, if the collision is perfectly elastic
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Hayleymeyer
  • Hayleymeyer
uhhhhhh..
anonymous
  • anonymous
ikr i dont understand
sohailiftikhar
  • sohailiftikhar
m1=7.20kg and m2=5.75kg v1=2m/s and v2=-1.3 that's all is given

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More answers

sohailiftikhar
  • sohailiftikhar
that is prety long Q you have to find 1st V1' and V2' through their formulas then use the relation of K.E at start and in the end ....
MrNood
  • MrNood
If the collision is elastic then the KE after is equal to KE before KE = 0.5mv^2
anonymous
  • anonymous
my answers are in joules
Hayleymeyer
  • Hayleymeyer
science?
anonymous
  • anonymous
physics
MrNood
  • MrNood
yes - Joules is the unit of energy if mass is in kg amd v in m/s then 0.5mv^2 is in joules
MrNood
  • MrNood
you DO know the formula for Kinetic Energy?
sohailiftikhar
  • sohailiftikhar
I mean what is the answer .???
anonymous
  • anonymous
i have no clue
MrNood
  • MrNood
I have told you how to work out the answer Work out the KE of both masses before the collision it is the same total after the collision
sohailiftikhar
  • sohailiftikhar
yes I know I am asking that is there any short cut to solve it in minimum time that's what is iwant....
anonymous
  • anonymous
50.8 was the right answer on the test question and i chose that one
MrNood
  • MrNood
yes - the short cut to getting it in the minimum time is to do it yourself using the formula I gave you above. OR you can wait until someone breaks the code of conduct, and does you the DISSERVICE of posting the answer here
sohailiftikhar
  • sohailiftikhar
no I can do that thx...
MrNood
  • MrNood
is 50.8 the answer to ALL questions? It doesn't seem right to me for this one Taking someone's answer with no explanation is a dangerous thing here - MANY answers here are just plain wrong
anonymous
  • anonymous
idk but thats what the computer said

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