Download How can you find an objects mechanical energy?

How can you find an objects mechanical
energy?
• Mechanical energy is the energy associated with the
motion, position or shape of an object.
• It is a combination of potential energy and kinetic energy.
• It is measured in Joules (J)
• Formula:
• Mechanical energy = potential energy + kinetic energy
Practice figuring out energy 
Potential
energy = 12 J
Kinetic
energy = 10 J
Mechanical
energy = ??
Potential energy = ??
Kinetic energy =20 J
Mechanical energy = 32 J
Potential energy = 120 J
Kinetic energy = ??
Mechanical energy = 312 J
What is the Law of Conservation of
Energy?
• Energy can neither be created nor destroyed… it just
changes form 
What is thermal energy?
• It is the total kinetic and potential energy of the particles in
an object.
• It is the reason why you feel heat when the particles in an
object move quickly.
Review Questions:
1. How can you determine an objects mechanical energy?
2. What is the law of conservation of energy?
3. An objects ________ is due to its position, its shape
and its motion.
4. The law of conservation of energy states that when one
form of energy is _______ to another, no energy is lost
in the process.
5. When potential energy changes to kinetic energy this is
called an ___________
6. When you rub your cold hands together to warm them
up, you are feeling _______ energy.