Definitions
What is Kinetic Energy?
Energy of Motion
What is Power?
Power is the Energy used or given in some amount of time
What is specific heat capacity?
The amount of energy needed to raise the temperature of some object by 1 degree Celsius
What is the potential energy of a an object that weighs 100N and is displaced 5 m in the same direction as the gravitational force?
500 J
If an object has a total of 100 J of energy at the beginning of some process, what is the maximum amount of energy that object can leave with assuming that processes adds no energy?
100 J
What is Potential Energy?
Stored Energy, or energy that has the potential to cause motion
If a force does work on an object the object must ____.
Move
What is latent heat capacity?
The amount of energy needed to accomplish some phase transition
What is the potential energy of a 10 kg object that is raised 5 m off the ground?
490 J
If two objects both have a kinetic energy of 100 J but one also has a potential of 100 J, what is the total energy of the system initially?
300 J
What is Work?
The energy given or taken by forces
A 400 W piece of equipment uses how many Joules of energy per second?
400 J
Describe the Heating Cooling Curve.
The Heating Cooling Curve is a graph that shows how temperature changes over time as heat is added to a substance, it shows the effects of both the object's specific and latent heat domains on the object's temperature.
What is power of an object that uses 100 J of power every 10 seconds?
10 W
When I turn off the lights at school, am I conserving energy in the physic's sense? Explain.
No, that is meaning conserving as in to save useful energy. In physics, when we say energy is conserved we are saying that the energy must always have been transferred never created or destroyed.
What is Thermal Energy?
The kinetic energy of particles, like atoms or molecules
A force that is perpendicular or at a right angle to the direction of motion of an object does ____ work.
No Work, Zero Work
What is 0 kelvin denote?
What is the Kinetic Energy of an 6 kg object that travels at 10 m/s?
300J
Does energy ever get used up? Why or Why not?
There is a finite amount of energy that we have in certain forms and as it changes forms it can travel to a form less useful to use or waste. However the energy itself is never "used" or "used up". It never goes away.
What is Energy?
Energy is a conserved quantity, that changes hands but is never created or destroyed that is related to mass and velocity of an object and does not depend on direction just amount, Ie. is a scalar.
A force that does negative work on an object is in the ____ direction compared to the object's motion or displacement.
Opposite
What happens to an object's temperature as you add heat during a phase transition?
It stays the same.
What is the velocity of an 5 kg object that falls off a 10m building right before it hits the ground?
14 m/s
Assume you calculate the gravitational potential energy of an object when it is not moving. Once the object falls and all its energy has become kinetic energy (when it reaches its top speed) you measure a certain velocity. Is this velocity likely to conflict with the velocity calculated from the kinetic energy being equal to the gravitational potential above? Why or why not?
There may be some energy lost due to air resistance or other negative work forces.