Potential Energy
True or false: Potential energy is movement energy. If false tell us what type of energy it really is.
False and stored energy
Kinetic energy is...
Motion energy
Calculate the potential energy of a cliff jumper with a mass of 5kg sitting on a cliff that is 30m high. Gravity (9.8 m/s)
1470 J
A battery powers a circuit for a small noisy fan. The fan’s motor gets warm as it turns. What are the energy transformations?
Chemical -> Sound -> Motion -> Thermal
A guy is walking his dog. He stops at a stop sign. What types of energy does he have?
Potential and Kinetic energy
Why does an object have potential energy?
It is due to its position and its mass
What is the formula for kinetic energy?
KE= 1/2mv^2
Calculate the kinetic energy of a 55kg truck rolling down a hill with a velocity of 8m/s.
1760 J
A ball rolls down a ramp. A small amount of friction heats up the ball before it falls off a shelf.
Motion -> Gravitational -> Thermal -> Gravitational
A runner is stretching and getting ready for a race. What type of energy does he contain?
Potential Energy
What are the variables needed with calculating potential energy?
mass, gravity, height
Give an example of where you could find kinetic energy when you are riding a skateboard.
When coasting or going down a ramp.
A 0.2g apple is in a 3m tall tree. What type of energy does this apple have and how much?
Potential energy = 6 J
A solar panel powers a houses electrical circuits. A lamp plugged into an electrical outlet is turned on. The lightbulb in the lamp glows and gets hot.
Nuclear -> Electrical -> Light -> Thermal
What type of energy does a trampoline have when you are jumping on it?
Kinetic Energy
If you are ridding a roller coaster, when would you have the MOST potential energy.
At the top of the first hill before you start descending
the __________ an object moves, the more kinetic energy it has
Faster
If a ball is rolling at 1 ft. per second and it is 2 pounds it has what type of energy and how much?
Kinetic Energy = 2
Water in an electric tea kettle heats up. The water boils noisily as it changes into rising water vapor.
Electrical -> Thermal -> Motion -> Sound -> Motion
On top of a roller coaster, which energy do you have?
Potential Energy
Name 3 types of potential energy.
Thermal potential energy, Chemical potential energy and light potential energy
Name 3 types of Kinetic Energy.
Motion energy, electrical energy, gravitational energy.
A 10kg object is lifted and had the potential energy of 196 J. What height is the object at?
2 meters
I was walking down the sidewalk eating a snack. I finished my snack and felt full. This gave me energy to go to soccer practice where I got hot and sweaty.
Motion -> Chemical -> Thermal
Where is Miss Korey's hometown?
Hood River, OR