Energy
Kinetic Energy
energy transferred by a force
work
Power is the rate at which _________ is done.
Work
a device that allows you to do work in an easier way
machine
Energy of Position
Potential Energy
the Law of Conservation of Energy
Energy cannot be created nor destroyed
the unit for work
joules
unit for power
Watts
4 types of simple machines
Inclined plane, wedge, screw, gears, pulley, lever, etc
In our roller coaster model, the greatest potential energy is found at the ________ point on the roller coaster.
Tallest/highest
unit for energy
joules
the equation to calculate work
Work = Force * distance
another unit of power (hint: used by James Watts to help people understand a "watt")
Horsepower
In general terms, a machine that allows you complete a task in ONE movement
A Simple Machine
the fixed point of a lever
the fulcrum
Newton (N) x meter (m)
there must be these two things in order for there to be work
2. force and distance must be done in the same direction
the equation to determine power
Power = Work/Time
the equation for mechanical advantage of a simple machine
MA = Foutput/Finput
In our roller coaster model, the least kinetic energy is found at the _________ point of the roller coaster.
Tallest/highest
the energy conversion of hairdryer (from what type to what type)
True or False. Work is being done when a women carrying a jug of water on her head walks to get water.
False
the amount of power a boy has when doing 50J of work in 2 seconds?
25 watts
the three ways machines make work being done easier
1. changes distance you exert the force
2. changes the amount of force exerted
3. changes the direction of force exerted
the class of lever when the effort is between the load and the fulcrum
Class III