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3 years ago

9

12. If the distance an object travels and the time it takes to travel the distance are known, which of the following can be calc

ulated? А Average speed B Average acceleration С Instantaneous speed Instantaneous acceleration

1 answer:

ehidna [41]3 years ago

4 0

Answer:

A

Explanation:

Average speed

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Given:

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$\dashrightarrow \mathrm{T}=2 \pi \sqrt{\dfrac{\mathrm{L}}{\mathrm{g}}}$

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$\dashrightarrow \mathrm{\dfrac{0.5}{2 \pi } }=\sqrt{\dfrac{\mathrm{L}}{\mathrm{9.8}}}$

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$\sf \dashrightarrow{\dfrac{\mathrm{L}}{\mathrm{9.8}}}= (\mathrm{\dfrac{0.5}{2 \pi } })^2$

$\sf \dashrightarrow{{\mathrm{L}}= (\mathrm{\dfrac{0.5}{2 \pi } })^2*9.8$

$\sf \dashrightarrow{{\mathrm{L}}=0.06205922 \ m$

1 m → 100 cm

$\sf \dashrightarrow{{\mathrm{L}}=6.2059\ cm$

$\sf \dashrightarrow{{\mathrm{L}}=6.21\ cm$ { rounded to nearest hundredth }

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Answer:0.246 m

Explanation:

Given

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t=0.224 s

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