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A particle is projected vertically upward with an initial velocity u. If g is the acceleration due to gravity, then which one of the following is the greatest height h attained by it?

(a) h = $\frac{2u^{2}}{g}$

(b) h = $\frac{u^{2}}{g}$

(c) h=$\frac{\frac{1}{2}u^{2}}{g}$

(d) h=$\frac{\frac{1}{4}u^{2}}{g}$

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