A toy company hires you to construct a device that uses a small spring to launch 15 g foam pellets. The spring requires an average force of 5.70 N to compress it 1.30 cm. Determine the speed of one of the foam pellets as it leaves the spring

Question

A toy company hires you to construct a device that uses a small spring to launch 15 g foam pellets.  The spring requires an average force of 5.70 N to compress it 1.30 cm.  Determine the speed of one of the foam pellets as it leaves the spring

abhisar · Answer

Do u know how to calculate potential energy of a spring ?

anonymous · Answer

ep=1/2kx^2?

abhisar · Answer

yes, now as the spring leaves...this potential energy is transferred to the pellet as its kinetic energy.

abhisar · Answer

So,
$\huge\tt \frac{1}{2}kx^2=\frac{1}{2}mv^2$

anonymous · Answer

do u manipulate the formula for v then?

abhisar · Answer

yes, u'll have to plug in the values and find v

abhisar · Answer

Note: value of k is not given

anonymous · Answer

how do u find k?

abhisar · Answer

What will you do now ?

abhisar · Answer

F=kx, so k=F/x
Put this in the equation above.

abhisar · Answer

F and x are given

anonymous · Answer

x=1.30cm 
f=5.70N right?

abhisar · Answer

yes...now just plug in the values and find v

anonymous · Answer

hi can you please send me the formula again it says error where the p0icture showed up yesterday? @Abhisar

abhisar · Answer

???

anonymous · Answer

oh its there again nvm! sorry lol

abhisar · Answer

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