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The displacement of a particle starting from rest (at `t = 0)` is given by `s = 6t^(2) - t^(3)`. The time in seconds at which the particle will attain zero velocity again, isA. 2B. 4C. 6D. 8 |
Answer» Correct Answer - B Displacement of the particle `s = 6t^(2)-t^(3)` Velocity of the particle `upsilon=(ds)/(dt)=(d)/(dt)(6t^(2)-t^(3))` `upsilon=12t-3t^(2)` For `upsilon = 0 rArr 12t=3t^() rArr t=4s` |
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