IIT JEE , AIEEE Forum - Physics , Mechanics

siddharthsaxena

here's another from ma side.......

A question based on dis concept came in ma coaching test.... hardly 3-4 were able to do it CORRECTLY.........

As i said in my earlier post, in an elastic collisision, kinetic energy converts into potential energy and back . Now the question is

WAT IS THE MAXIMUM VALUE

OF THIS POTENTIAL

ENERGY???????????

Most of students thought K.E -> P.E , and

thus wrote the value of K.E. as their answers..

But the truth is dat, P.E is max at dat instant when

V _RELATIVE= 0 ,(AND NOT V=0) that is

when both move with equal velocity...............

and KINETIC ENERGY AT THAT INSTANT IS NOT 0 BUT IS MINIMUM ..

HOPE IT BENEFITS U .....................

(DO NUDGE FOR ANY EXPLAINATION )