(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 140-N child is in a swing that is attached to ropes 2.00 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.

(a) when the ropes are horizontal

I get this one. I used PE=mgy; PE=(140-N)(2.00 m)= 280 J

However, I'm unsure how to approach part B, so if someone could just nudge me in the right direction I would really appreciate it (you certainly don't have to work it out--I'm not asking you to do my work).

(b) when the ropes make a 25.0° angle with the vertical

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# Gravitational Potential Energy child swing Problem

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