What we did this Thursday

I can't really remember what we did on Thursday so this blog will be kind of short.

We had a sub on Thursday, it was Mr.Newman. On this day we went over
the sheets that Ms K had given us the day before. These sheets where about defining
gravitational potential energy. It's basically about how much energy rockets have on
the earth and how much they have after they have left the earth and what is the escape
speed they need to have, i think it's around 11.2 km/s.