Energy
- You will need to pick up a copy of the Energy notes to fill in the organizer. Go to Energy Guided Notes video (www.showme.com/sh/?h=1Vou6fw) and follow along pausing if necessary to fill in. It will not allow me to like the video so you will need to copy and paste the address above.
- Energy is the ability to do work. We are focusing on two types of Mechanical Energy. Mechanical energy is energy due to the movement or position of an object. The two types of mechanical energy are kinetic energy and potential energy.
- Kinetic energy is the energy of motion or energy of a moving object. The way to get kinetic energy is to do work to change the speed. One example would be a bowling ball doing work when it hits pins. The equation for kinetic energy is KE=1/2mv2 (kinetic energy is equal to one half times mass (in kg) times velocity (in m/s) squared).
- One example calculation for kinetic energy is given a 2kg ball rolls at a speed of 3 m/s what is the kinetic energy? In order to solve you would fill in your equation by multiplying 1/2 x 2kg x (3m/s)2 which gives you a total of 9 Joules.
- Potential energy is stored energy due to an object's position. The way to get potential energy is to do work against another force. Examples of potential energy are gravitational potential energy (GPE) and elastic potential energy (EPE) such as a rubber band. The equation for GPE = mgh (gravitational potential energy is equal to mass (in kg) times gravity (9.8 m/s2) times height (in m).
- One example calculation for gravitational potential energy is calculating the potential energy to lift a 2kg book a height of 3 meters. In order to solve you would fill in your equation by multiplying 2kg x 9.8 m/s2 x 3m which gives you a total of 60 Joules.