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# Physics - springs

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A 1.2 kg block is hung from a vertical spring, causing the spring to stretch by 2.4 cm How much further will the spring stretch if a 0.60 kg block is added to the 1.2 kg block?

Guest Feb 28, 2017
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A 1.2 kg block is hung from a vertical spring, causing the spring to stretch by 2.4 cm How much further will the spring stretch if a 0.60 kg block is added to the 1.2 kg block?

$$1.2:2.4=(1.2+0.6):(2.4+x)$$

$$1.2\times2.4+1.2x=2.4\times1.8$$

$$1.2x=2.4\times1.8-1.2\times2.4$$

$$\large x=\frac{(2.4\times1.8-1.2\times2.4)cm\times kg}{1.2kg}$$

$$x = 1.2 cm$$

$$The \ spring \ expands \ by \ a \ further \ 1.2cm.$$

!

asinus  Feb 28, 2017

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