Quarter 2, Blogpost #8

This is the third time I've forgotten to do my blog post, so this is my blog from the week before (: Last week we learned about types of energy. We were taught about the potential energy of gravity, the potential energy of a spring, and kinetic energy. The equation for the potential energy of gravity reads, PEg = mass x gravity x height. The equation for the potential energy of a spring reads, PEs = 1/2 k(spring constant) x distance ^2. Lastly, the equation for kinetic energy reads, KE = 1/2 mass x velocity ^2 . The units of energy are Nm (Newtons x meters) or J (Joules). In this picture, my little sister Ilikea and I are walking up the stairs in our house. Using components from this picture you would be able to calculate both our potential energy and kinetic energy. To find our potential energy, you would multiply our mass in kilograms, by gravity (9.8 m/s^2), and then by our height change (the height of each stair added together). In order to find our kinetic energy you could calculate half of our mass multiplied by our velocity squared. You could use the equations of PEg and KE for each of us to find our individual potential and kinetic energy.