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A body of mass 2kg is projected vertically upwards with a speed of `3m//s`. The maximum gravitational potential energy of the body is :
A. 18 J
B. 4.5 J
C. 9 J
D. 2.25 J

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(c ) Gravitational potential energy (maximum) = kinetic energy `=(1)/(2)m upsilon^2 = (1)/(2) (2) (3)^2 =9J`

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