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
Stacey Warren - Expert brainly.com
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ikr i dont understand
m1=7.20kg and m2=5.75kg v1=2m/s and v2=-1.3 that's all is given
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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 ....
If the collision is elastic then the KE after is equal to KE before
KE = 0.5mv^2
my answers are in joules
yes - Joules is the unit of energy
if mass is in kg amd v in m/s then 0.5mv^2 is in joules
you DO know the formula for Kinetic Energy?
I mean what is the answer .???
i have no clue
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
yes I know I am asking that is there any short cut to solve it in minimum time that's what is iwant....
50.8 was the right answer on the test question and i chose that one
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
no I can do that thx...
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