(Speed)? The square of speed vs tim...
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(Speed)? The square of speed vs time graph for a particle is shown in the figure. The force vs time graph for the particle may be - 2 time (A) (B) (C) Force (D) Force Force Force time time time m l ima with time variable ennod lf at times

JEE/Engineering Exams
Physics
Solution
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(speed) ( ^{2} alpha ) time ( F= ) ( u^{2} alpha t ) ( V propto sqrt{t} ) ( V=k sqrt{t} ) ( operatorname{graph} phi_{f}^{k / sqrt{t} i} quad frac{partial v}{partial t}=frac{1}{2} k frac{1}{sqrt{t}} ) ( a propto frac{1}{sqrt{t}} ) i.e ( a=frac{k}{sqrt{t}} ) Ans
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