How do i explain reference points???????????????//参照点を説明するにはどうすればよいですか

Advanced Placement (AP)

1 answer:

Evgen [1.6K]2 years ago

7 0

基準点は何ですか？これは頭の中でですか

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Explanation:

$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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FRQ:

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Answer:

Oh he is correct

Explanation:

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