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# helllp im in exaaaam

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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

#1
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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  $$a=- 0.\overline{44}m / sec ^ 2.$$

Sep 22, 2020