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the product of the net force on an object and the distance through which the object is moved (force x distance)
energy of motion
depends on mass and speed
equals half the mass x the square of the speed
KE = 1/2 mv^2
kinetic energy of a moving object
equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest
net force x distance = KE
Fd = 1/2mv^2
work energy theorem
relationship between work and energy
whenever work is done energy changes
work = ^KE
law of conservation of energy
energy cannot be created or destroyed. it can be transformed from one form into another, but the total amount of energy never changes
device used to multiply forces or change direction of forces
cannot put out more energy than is put in it
transfers energy to one place or another or transforms it from one form to another
simple machine made of a bar that turns about a fixed point
work input - work output
Fd(in) = Fd(out)
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