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3 years ago

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The velocity v of an object rolled down an inclined plane is given by the formula v=39d where d is the distance the object has r

olled solve the formula for d

1 answer:

Nadya [2.5K]3 years ago

4 0

V = 39d

Make d the subject

d = v/39

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$S_{12}=\sum_{i=1}^{12} [\frac{3}{2}+(i-1)\times \frac{5}{6}]$

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$S_n=\frac{3}{2}\times n+\frac{5}{6}\times \frac{n(n-1)}{2}\\\\$

$S_{12}=\sum_{i=1}^{12} [\frac{3}{2}+(i-1)\times \frac{5}{6}]$

$S_{12}=\frac{3}{2}\times 12+\frac{5}{6}\times \frac{(12)(12-1)}{2}\\\\S_{12}=18+55\\\\S_{12}=73$

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