DE_Phys_3.1.1

DE_Phys_3.1.1_What Are Two Main Types of Energy, and What Are Some Examples of These Types of Energy?

Examples

• Thermal Energy

• Sound Energy

​Kinetic Energy (KE)
Energy of Motion

​​Elastic Potential Energy (PE)

PE_elastic=1/2kx²

​​Gravitational PE_grav=mgh

​​Chemical PE

​​Electric PE

PE_elect=kq₁q₂/r²

Open Ended

A soccer ball is kicked horizontally across a field with an initial velocity of magnitude 15 m/s. If the soccer ball has a mass of 0.43 kg, what is the kinetic energy of the ball just after it is kicked? Use Desmos to calculate. Significant figures and Units Count!

Open Ended

An egg of mass 0.060 kg is dropped from the top of a building. Just before it reaches the ground, it has a total kinetic energy of 5.9 J. What is the velocity of the egg just before it strikes the ground? Use Desmos to calculate. Significant Figures and Units Count!