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Energy

Work, Energy, Pendulum, Potential and Kinetic Energy, Calculating Work

QuestionAnswer
What are the three things necessary to do work? Force, Distance and Direction
What is the formula for work? Work = Force x Distance
What is potential energy? Potential energy is stored energy or energy at rest.
What is the formula for potential energy? Potential energy = Weight x Height
What is kinetic energy? Kinetic energy is released energy or energy in motion.
What is the formula for kinetic energy? KE = 1/2 x Mass x (Velocity squared)
What is the unit on energy and work? A Joule
What is the Law of Conservation of Energy? The Law of Conservation of Energy states that energy cannot be created or destroyed, but transformed to other types of energy, such as heat or sound.
What are the five different types of kinetic energy? Mechanical, Heat/Thermal, Sound Waves, Electromagnetic Waves, Electrical
What are the four different types of potential energy? Elastic, Gravitational, Nuclear, Chemical
Is this an example of GPE, EPE or KE: A dam holding back a large reservoir of water GPE
Is this an example of GPE, EPE or KE: A ball hit off a bat. KE
Is this an example of GPE, EPE or KE: A child holding a yoyo. GPE
Is this an example of GPE, EPE or KE: An archer pulling back the string of his bow. EPE
Is this an example of GPE, EPE or KE: Winding a watch. EPE
Is this an example of GPE, EPE or KE: A catapult loaded with a boulder. EPE
Is this an example of GPE, EPE or KE: A flowerpot falling from a windowsill. KE
Is this an example of GPE, EPE or KE: A rollercoaster that has reached the top GPE
Is this an example of GPE, EPE or KE: A moving stream. KE
Is this an example of GPE, EPE or KE: A marble rolling across a table. KE
Is this an example of GPE, EPE or KE: An explosion. KE
Is this an example of GPE, EPE or KE: A skier at the top of a steep slope. GPE
How can you identify GPE? GPE is always stored or being held back. The height is involved. It is rested and not releasing anything.
How can you identify EPE? EPE is always stretched or winded back, ready to be in motion. It has pent up potential energy, but it is called elastic because it is coiled, stretched, and wound.
How can you identify KE? KE is always in motion.
Created by: leocaplan