Given the equation Eki + Egi = Ekf + Egi(adsbygoogle = window.adsbygoogle || []).push({});

Which is initial kinetic energy plus initial potential energy equals final kinetic energy plus final potential energy.

If i were to measure the speed of a rollercoaster at the end of its position of a height of 3 and it's initial height is 12 which of these answers are true?

initial / final

1/2*m*vf2 + mgh = 1/2*m*vf2 + mgh

1/2*0 + 9.8m/s2 (12m) = 1/2*vf2 + 9.8m/s2(3)

initial / final

1/2*m*vf2 + mgh = 1/2*m*vf2 + mgh

1/2*0 + 9.8m/s2 (9m) = 1/2*vf2 + 9.8m/s2(0)

*note mass is not included due to they cancel out.

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# Homework Help: Given Eki + Egi = Ekf + Egi

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