Work
What is the formula for work?
Work=Force x Distance
What is the formula for power?
Power = Work / Time
What is the formula for Kinetic Energy
KE = 1/2 mass x velocity2
What is the formula for Potential Energy?
PE = mgh
What is one of the seven forms of energy that we discussed in class?
Mechanical, Electrical, Chemical, Radiant (light), Thermal (heat), Sound, Nuclear
Define work
The product of force applied and the distance the object moves.
Define Power
The measure of work done in a certain amount of time.
Define Kinetic Energy
Energy of motion
Define Potential Energy
Stored energy
What is energy that is present when an object produces light?
Light/radiant energy
What is a unit of work?
Newton meter (Nm), foot pounds (ft lbs)
What is a unit of power?
Horsepower, Watt, Joule/sec
What is an example of Kinetic Energy?
Walking, running, throwing something, etc.
What is an example of potential energy?
Waiting at the top of a hill on a roller coaster.
What is the energy that is present when an object produces sound?
Sound energy
A man applies a force of 60N for a distance of 11m. Calculate the work done.
660Nm or J
A person with a mass of 150lbs runs up a flight of stairs with a vertical height of 20 feet. If the trip takes 3 seconds, calculate the amount of power.
1000 ft lbs/s
What does kinetic energy depend on?
Mass and velocity
What does potential energy depend on?
Weight and height
What is energy that results from the movement of particles?
Thermal/heat energy
A crate with a mass of 100kg is pushed along a floor with a force of 30N for a distance of 6m. Calculate the work
180 J or Nm
A person with a mass of 160lbs runs up a flight of stairs with a vertical height of 12 feet. If the trip takes 8 seconds, calculate the amount of horsepower.
0.44 HP
How much kinetic energy does a 0.5kg basketball have when it is thrown at a speed of 16m/s?
64 J
A football with a mass of 11kg is lifted to the top of a hill with a height of 200m. How much potential potential energy does the football have?
21,560 J
What is energy that comes from moving objects or objects that have stored energy?
Mechanical energy