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Vinil7 [7]
3 years ago
14

In order for work to be done to an object what requirement has to be met

Advanced Placement (AP)
1 answer:
castortr0y [4]3 years ago
6 0
I think it is C... yes most likely C

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$$At the farthest point the velocity of particle will be zero. \ Differentiating the given equation of position and equating it with zero:$$\begin{aligned}x(t) &=5 t^{3}-9 t^{2}+7 \\x^{\prime}(t) &=15 t^{2}-18 t \\0 &=15 t^{2}-18 t \\t(15 t-18) &=0 \\t &=0 \\t &=\frac{18}{15}=1.2 \mathrm{~s}\end{aligned}$$

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