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An object (has x coordinate of -3 cm) is starting motion from rest along x axis with uniform acceleration. If its x coordinate 3 s later is -5 cm, then its acceleration is:

 Sep 22, 2020
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An object (has x coordinate of -3 cm) is starting motion from rest along x axis with uniform acceleration. If its x coordinate 3 sec later is -5 cm, then its acceleration is:

 

Hello Guest!

 

\(s=x_0-x_1=\color{BrickRed}-3cm+(-5cm) \)

\(s=-2cm\)

\(t=3\ sec\)

\(s=\frac{1}{2}at^2 \)

\(a=\frac{2s}{t^2}\\ a=\frac{2\cdot (-2cm)}{(3sec)^2}\)

\(a=-0.\overline{44}m/sec^2\)

 

The object experiences a negative acceleration (backwards) of  \(a=- 0.\overline{44}m / sec ^ 2.\)

laugh

 Sep 22, 2020

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