Kinetic and Potential Energy
What is Kinetic Energy?
Energy of Motion
The energy of an object due to motion or position is..
(KE+PE)
Mechanical Energy
Solve for PE. Remember g=9.8m/s^2
mass= 5 kg
height = 2 m
98 J
When standing on a trampoline, what type of energy does it have?
Elastic PE
When Mr. Anderson eats Chick-fil-A, what kind of energy is in the food he's consuming?
Chemical energy
Explain potential energy. Be sure to mention the different types
Potential energy is stored energy. The two main types are gravitational potential energy (stored because of height) and elastic potential energy (stored when something is stretched or compressed).
Kinetic Energy + Potential Energy
Solve for KE. Remember to square the speed.
mass = 10 kg
speed = 4 m/s
80 J
What is Mr. Anderson's favorite number (it's odd and less than 20.
13 (or 3)
This type of energy is produced when objects vibrate and travel through a medium like air or water.
Sound energy
The ______ an object moves and the more ______ of an object, the greater the kinetic energy.
faster, mass
Explain how a roller coaster has mechanical energy
it has potential energy when it is high at the top of the track and kinetic energy when it is moving down the track.
Mr. Bonner played with a basketball that has a mass of 6 kg atop a 3 m hill. What is the basketball’s potential energy?
176.4 J
This energy comes from the movement of particles in a substance; the faster the particles move, the more of this energy an object has.
Thermal energy
How many teachers total work at NP?
11
Why is kinetic energy dependent on potential energy?
because the more potential energy is available to convert, the faster the object can move, creating more kinetic energy.
Mechanical energy is the overall energy of...
Motion
Solve for KE.
Mass: 1200 kg
Speed: 10 m/s
60,000 J
Light, X-rays, and radio waves are all examples of this type of energy that can travel through empty space.
Electromagnetic energy
When Mr. Anderson’s 8th graders are being loud and not listening, the vibrations from their voices are examples of this type of energy traveling through the air.
Sound Energy
A roller coaster is stopped at the very top of a tall hill and then released to race downward. At which point does the coaster have the most potential energy, and at which point does it have the most kinetic energy?
The roller coaster has the most potential energy at the top of the hill and the most kinetic energy at the bottom of the hill, where it is moving the fastest.
An object with mechanical energy has a combination of both.....
Kinetic and Potential energy
What is the mechanical energy of a car that has a mass of 12 kg, is moving at 20 m/s, and is 2 m above the ground?
*KE+PE=ME (solve for KE, then PE)
2,635.2 J
When you eat food, your body converts this stored energy in molecules into motion and heat, demonstrating a transformation from chemical energy to both kinetic and thermal energy.
Chemical energy
Will the patriots make it back to the superbowl??
Yes (I hope not)