Energy
Unit for Energy
What is Joule?
The equation for work.
What is W=F x D
John throws a baseball with a force of 30N and the ball travels 10 meters. What is his work?
300 J (fxd = 30x10)
The number of classes of levers.
What is 3?
The ability to do work and cause change.
What is energy?
The two general forms of energy
What are potential and kinetic?
The Joule is named after this British physicist.
Who is James Prescott Joule?
the type of potential energy used by a sky diver
Gravitational potential energy.
What is a wedge?
How quickly work is done.
What is power?
Energy that drives winds, ocean currents, and weather.
What is solar (radiant) energy?
The amount of watts one horsepower contains.
What is 745.5 watts?
What is a closed system?
This is where the input force is applied in a third class lever.
What is between or middle?
What is input force?
A rubber band is stretched and then let go. Mechanical energy is derived from which energy.
mechanical advantage measured by input distance over output distance.
What is ideal?
The energy transformation that occurs as water descends from the atmosphere to the biosphere and creates erosion.
What is mechanical energy?
a combination of two or more machines.
What is a compound machine?
energy and matter are free to enter and leave.
What is an open system?
The equation for kinetic energy.
What is 1/2mv2?
equation for power.
What is P = W / T
two energy transformations that occur when a train comes to a stop.
What are sound energy, thermal energy (friction), stored mechanical/elastic potential energy
This along with the direction and distance of the force can be changed by a machine.
What is size (of force)?
Energy cannot be created or destroyed.
What is the Law of Conservation of Energy?