Force, Motion, Work, Power
Unit of measure for work
Joules
Kinetic Energy
(also Mechanical energy)
Which of the following is not a form of energy?
Sound, Light, Heat, Water, lightning
Water
True or False?
When you use an electric fan, electrical energy is transformed into kinetic energy.
TRUE!
The unit of measure for power is....
Watts (w)
Power (watts)
The type of energy that is defined by either it's position or it's shape is called....
Potential Energy
Lightning is a form of which type of energy?
Electrical
True or False?
When you hit a tennis ball with a tennis racket, kinetic energy is created for ball to make it move.
FALSE!
Kinetic energy is transferred from the racket to the ball.
Work or Joules
Work (joules)
The higher up you hold any object, the more _________ ________ energy it has.
Gravitational potential
Which type of energy is only kinetic energy?
Electrical, Chemical, Electromagnetic radiation, mechanical, Nuclear, or Thermal
Electromagnetic radiation
If a ball is rolling down a hill, and half way down the hill we calculate the energy. The kinetic energy is 8 J and the gravitational potential is 7 J. What is the mechanical energy is....
15 J
8 J + 7 J = 15 J
Mr. Byrd turned on the oven to bake chicken for dinner. Name one energy transfer and one energy transformation that happens while he cooks.
Energy transformation-electrical to thermal
Energy transfer-thermal from oven to chicken
A 10kg dog runs at a speed of 2 meters per second in a time of 120 seconds. His kinetic energy is....
20 J
On a roller coaster, what part of the ride has the greatest amount of gravitational potential energy?
The part of the ride that is the highest point (usually at the beginning of the ride)
Which types of energy is only potential energy?
Electrical, Chemical, Electromagnetic radiation, mechanical, Nuclear, or Thermal
Chemical and Nuclear
Transformation: chemical to electrical or electrical to thermal or electrical to electromagnetic
Transfer: electrical along the wire from the battery to the bulb
Sunlight enables plants to use water and carbon dioxide during photosynthesis to make and store sugar. Any animal that eats the plants can convert the sugar into the energy it needs to move from place to place. What are 3 energy types involved in this example?
Chemical, Electromagnetic, Thermal
Mike is digging a small hole. He does 50 J of work in 25 minutes. The amount of power he uses is......
2 W
A ball is dropped from the roof of Pioneer. After 1 second on the way down the kinetic energy is 2 J and the mechanical energy is 5 J. What is the potential energy?
3 J
KE + PE = ME
2 J + 3 J = 5 J
They both are the sum of kinetic and potential energy.
Kinetic energy of the train wheels transformed into thermal energy in the rails.
If you split an atom it releases nuclear energy. Exactly how many joules of energy are released when 7 atoms of uranium are split?
How am I supposed to know? This isn't a college level class.