Energy
What is the definition of energy?
ability to do work
what is the definition of work?
the transfer of energy (force moves an object through a distance)
A 20kg student is running at 5m/s. What is the student's kinetic energy?
250J
An apple hanging from a tree
What is the Grinch's dog called?
Max
GPE = mass x acceleration due to gravity x height
what is the power formula?
P = W/t
You lift a 3.0kg mass 2.0m off the floor. Calculate the gravitational potential energy of the mass.
58.8 J
An X-ray
Electromagnetic Energy
Black Panther’s vibranium suit allows him to absorb what type of energy for later release as a force blast?
Kinetic Energy
This is the energy of motion.
Work = Force x Distance
You push a car with a force of 400N and a distance of 20m. How much work have you done pushing the car?
8000J
A battery
Chemical > Electrical
What was the name of the little boy in Charles Dicken's A Christmas Carol who said "Merry Christmas, one and all?"
Tiny Tim
What does the Law of Conservation of Energy state?
energy is never created or destroyed, it is only changed from one form to another.
what is the definition of power?
The rate of doing work
A boat does 3000J of work for 10 seconds. What is the power of the boat?
300W
A lightbulb
Electrical > Thermal + Light
When is Kinetic Energy the greatest for a skateboarder?
At the very bottom of the ramp
You and your friend are lifting weights. You lift 20lbs, 2m high in 6seconds. Your friend lifts 20lbs, 2m high in 3seconds. Who had more power?
Your friend, because it took less time to push the weight.
Ms. Dushay ran a mile (1609m) using a force of 200N with a power output of 450W. How many seconds did it take for her to run the mile?
715.11 seconds
When electricity flows through a light bulb, the filament (wire) heats up and then produces light.
Electrical > thermal > electromagnetic
What is the name of the axe that is forged from the heat of a dying neutron star for Thor?
Stormbreaker