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anonymous

  • one year ago

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

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  1. Hayleymeyer
    • one year ago
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    uhhhhhh..

  2. anonymous
    • one year ago
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    ikr i dont understand

  3. sohailiftikhar
    • one year ago
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    m1=7.20kg and m2=5.75kg v1=2m/s and v2=-1.3 that's all is given

  4. sohailiftikhar
    • one year ago
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    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 ....

  5. MrNood
    • one year ago
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    If the collision is elastic then the KE after is equal to KE before KE = 0.5mv^2

  6. anonymous
    • one year ago
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    my answers are in joules

  7. Hayleymeyer
    • one year ago
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    science?

  8. anonymous
    • one year ago
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    physics

  9. MrNood
    • one year ago
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    yes - Joules is the unit of energy if mass is in kg amd v in m/s then 0.5mv^2 is in joules

  10. MrNood
    • one year ago
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    you DO know the formula for Kinetic Energy?

  11. sohailiftikhar
    • one year ago
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    I mean what is the answer .???

  12. anonymous
    • one year ago
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    i have no clue

  13. MrNood
    • one year ago
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    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

  14. sohailiftikhar
    • one year ago
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    yes I know I am asking that is there any short cut to solve it in minimum time that's what is iwant....

  15. anonymous
    • one year ago
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    50.8 was the right answer on the test question and i chose that one

  16. MrNood
    • one year ago
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    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

  17. sohailiftikhar
    • one year ago
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    no I can do that thx...

  18. MrNood
    • one year ago
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    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

  19. anonymous
    • one year ago
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    idk but thats what the computer said

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