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A particle is moving along `x-`axis whose position is given by `x=4-9t+(t^(3))/(3)` then choose the CORRECT statement for thes motion`-`A. Direction of motion is not changing at any of the instantsB. For `0lttlt2s`, the particle is speeding upC. Direction of motion is changing at `t=3`secD. For `0lttlt3s` the particle is speeding up. |
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Answer» Correct Answer - C `x=4-9t+(t^(3))/(3)rArrv=(dx)/(dt)=(-9+t^(2))` and `a=((dv)/(dt))=2t`. Therefore (`vlt0` and `agt0` for `0lttlt3s`) |
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