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A particle is projected at an angle thet...

A particle is projected at an angle `theta=30^(@)` with the horizontal. Two students A and B have drawn the variation of kinetic energy and gravitational potential energy of the particle as a function of time taking the point of projection as the reference level for the gravitational potential energy. Who is wrong and why?

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The correct Answer is:
A is wrong. Under given conditions the two curves cannot touch.
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