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2015-11-22T13:36:00+05:30

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P.E. IS PRESENT WHEN THERE
IS HEIGHT TO THE OBJECT
BECAUSE P.E.=mgh
MASS AND GRAVITATION ARE
 HOWEVER PRESENT FOR A BIRD.
K.E. IS PRESENT FOR AN OBJECT
IF THE OBJECT HAS VELOCITY
BECAUSE K.E.=1/2mv²
∴A FLYING BIRD HAS BOTH K.E AND P.E.
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