Kinetic and Potential Energy
Define "Kinetic Energy"
The energy of motion.
What energy type is this: Is energy that an object has because of its position relative to other objects
Potential Energy
What is the 1st law conservation of energy?
Energy cannot be created nor destroyed, just transferred.
A small dog with a mass of 6 kg runs at a speed of 4 m/s. What is its kinetic energy?
48J
If a Softball (6.25 Ounces) and a Baseball (5 Ounces) are thrown with the same velocity, which would create more Kinetic Energy? Why?
Softball since it has more mass.
Is the Following an example of potential or kinetic energy:
A key hanging on a keychain.
Potential
What energy type is this: Heat energy reflects the temperature difference between two systems.
Thermal
True or False: Energy can be destroyed.
False
A cat of mass 4 kg runs at 8 m/s chasing a toy. What is the kinetic energy?
128J
How does the 1st law of thermodynamics apply to roller coasters?
At the top of a hill, the potential energy is high and when the roller coaster goes down, it gets converted to kinetic energy.
Name three concepts of physics that the roller coaster must obey in order to be successful. EXPLAIN.
Potential Energy, Kinetic Energy, Thermal Energy, Gravity, and Friction are all acceptable
What energy type is this: The energy given to humans from food.
Chemical
What is an energy transfer?
When energy transfers from one type to another.
A golf ball of mass 0.045 kg is hit at 80 m/s. What is the kinetic energy?
144
When the skater was going up and down the "U" shaped ramp, the potential and kinetic energy were increasing and decreasing, what changed about the "Total Energy"?
Nothing. It stayed the same.
What is the formula for Kinetic Energy?
E=1/2mv2
What kind of energy is this: A form of mechanical energy caused by vibrations.
Sound
If a skateboarder were to go up and down a "U" shaped ramp and the skateboarder gets up to the same height on both sides, what would have to be true for that to happen?
No friction
A runner weighing 55 kg sprints at 10 m/s. What is the kinetic energy?
2,750J
What on the roller coaster simulation created thermal energy?
Friction
What is the equation for Potential Energy?
E=mgh
What kind of energy is this: The radiant energy in the form of electromagnetic radiation that is visible to the human eye.
Light Energy
You have a minute to come up with a scenario with at least 6 energy types and 3 transformations.
Potential, Kinetic, Sound, Light, Chemical, and Thermal
There is a sled that weighs 10kg and it is falling at 8m/s. If a 20kg child were to get on the sled and fall at 12m/s, how much would the kinetic energy change?
Energy with sled: 320J
Energy with sled & Child: 2,160J
Difference between the two: 1,840J
Are you sure?
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