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InterviewSolution
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The equation of motion of a particle moving along a straight line is `s=2t^(3)-9t^(2)+12t`, where the units of `s` and `t` are centrimetre and second. The acceleration of the particle will be zero afterA. ` (3)/(2)s`B. `(2)/(3)s`C. `(1)/(2) s `D. `1 s ` |
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Answer» Correct Answer - A `(ds)/(dt)=6t^(2)-18t+12` Again , ` (d^(2)s)/(dt^(2))=12t-18`= acceleration If acceleration becomes zero , then `0=12t-18` `implies t=(3)/(2) s ` Hence , acceleration will be zero after `(3)/(2)s `. |
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