Introduction to Energy
What is the SI Unit of Energy?
What is Joule?
Kinetic Energy is the energy of what?
What is motion?
List the four different fundamental forces.
Gravitational, Electromagnetic, Weak Nuclear, and Strong Nuclear
What is the equation for Kinetic Energy?
KE=1/2mv2
What is the simplest form of motion?
What is translational motion?
What are the three forms of energy?
What is the simplest form of kinetic energy?
What is whole-body kinetic energy?
When calculating for potential energy. There is a standard value for the strength of gravity (g). What is is?
What is 9.81 m/s2?
What is the equation for potential energy?
PE=mgh
True or False.
Both gravitational and electromagnetic force have an unlimited range.
What is True?
Energy is divided into two parts. What are they?
What is Mechanical and Non Mechanical?
True or False.
Kinetic Energy is affected much more strongly by a change in mass than by a change in speed?
What is false?
List two different types of potential energy.
Magnetic, Electric, Elastic, Nuclear, or Gravitational.
Calculate the kinetic energy of a 8.0 kg object moving at 20 m/s.
What is 1,600 J?
Fill in the blank.
Energy is the ability to do work and change what?
What is matter?
Complete the sentence.
Energy can not be created nor destroyed. It can only be what?
What is transferred?
What four factors affect rotational energy?
What is shape, size, speed, and mass?
True or false.
Gravitational force only affects objects with an electric charge.
False
What is the gravitational potential energy of a 5 kg object that is 0.75 m above the ground?
What is 36.78 J?
The v in the equation to solve kinetic energy represents what?
What is speed?
Albert Einstein created an equation for the special theory of relativity. What is the equation?
What is E=mc2?
What is the difference between transitional motion and transitional motion.
Translational motion- an object moving in space, changing its position.
Rotational motion- an object that spins or rolls around an internal axis.
List the fundamental forces in order from weakest to strongest.
Gravitational Force, Weak Nuclear Force, Electromagnetic Force, Strong Nuclear Force.
An object has a speed of 12 m/s, a mass of 20 kg, and height of 0.75 m off of the ground.
If you calculated both the kinetic and gravitational potential energy, which one would be greater?
KE= 1,440 J
PE= 147.15 J
What is Kinetic Energy?
Fill in the bank.
When matter is converted into energy (or vice versa), the law of conservation of energy must be restated as what?
What is the law of conservation of matter?