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 of Thermodynamics?
Energy cannot be created nor destroyed, just transferred. (The law of conservation of energy)
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
What is entropy?
The degree of disorder or randomness in the system.
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 the importance of the 0th law of thermodynamics?
We can use a thermometer to compare the temperatures of two different things.
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
The 2nd law of thermodynamics states that: "In any spontaneous process, the total entropy of an isolated system always _______."
Increases
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
Explain the 0th law of thermodynamics while using science-specific language. The words you must use in your explanation are:
- System and Thermal Equilibrium.
If the thermometer (system A) reaches thermal equilibrium with the water (system B), and then is also in thermal equilibrium with the room (system C), the law tells us the water and the room are also at the same temperature as the thermometer.
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
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