What is the equation for finding the total energy in a closed system?
Mgh + 1/2mv^2
100
What is energy?
The ability to do work.
100
What is the law of conservation of energy?
That no energy can be lost.
100
If 5000J of work is done in 1.7s, how much power is used?
2941.18 Watts
200
What type of energy are Gravitational and Elastic energy?
What is Potential Energy
200
What type of energy is Sound Energy?
Kinetic Energy
200
What is the equation for finding work?
Force * distance or change in kinetic energy
200
Find the amount of work done if you use 800 watts of power in 3 seconds.
2400 J
200
What is the formula for finding Work using nonconservative forces?
Change in Kinetic Energy + Potential Energy
300
What is the kinetic energy in a system if an object has a mass of 10 kg and a velocity of 5 m/s?
125J
300
What type of force is unaffected by the direction of the force?
Conservative Force
300
How much was work done to get a 50 kg object from rest to 7 m/s?
1225J
300
Find the gravitational potential energy of a man weighing 90 kg standing on top of a 23 meter tower.
20286 J
300
An object weighing 5 kg is at rest on top of a 15 meter tower, it falls. What is the Potential Energy and Kinetic Energy of the object at 2 meters above the ground?
Potential Energy = 98 J
Kinetic Energy = 637J
400
A rollercoaster at point A has a potential energy of 100J and a kinetic energy of 50J. What is the kinetic energy at point B if it has a potential energy of 20J?
130J
400
What is a system?
A boundary surrounding the objects with which you are concerned.
400
What is work?
The flow of energy in or out of a system.
400
What is the velocity of an object with a mass of 21 kg and a Kinetic Energy of 654 J?
7.9 m/s
400
How much work is done if an object is pulled with a force of 214N at an angle of 32 degrees for a distance of 11 meters?
1996.31 J
500
What is the power in a system if 500J of work is done in 6 seconds?
83.3 Watts
500
What type of force is dependent on the path the force takes?
Nonconservative Forces
500
500N of force are applied to an object over a distance of 21 meters. Find the amount of work.
10500J
500
What is the kinetic energy of an object with a mass of 3 kg and a velocity of 500 m/s?