26 terms

Abeka Physics Chapter 11

This set will cover Abeka Physics Chapter 11: "Work and Machines" (pages 158-171).
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work
term for the transfer of energy from one body to another
force
The amount of work accomplished depends on the magnitude of the ____.
W = Fd and W = Pt
the basic work equation and the equation for work in terms of power
scalar quantity
Is work a vector quantity or a scalar quantity?
negative work
A force applied opposite to the motion does _____ ____.
net work
term for the algebraic sum of positive work and negative work
power
term for the time rate of doing work
P = W / t
the equation for average power
watt
the SI unit of power
fulcrum
term for a point on which a lever pivots freely
load
term for an object resting on one end of the lever
input force
term for the force applied to a lever
output force
term for the force applied to the load by a lever
input distance
term for the distance through which the input force acts
output distance
term for the distance through which the output force acts
input lever arm
term for the distance from the fulcrum to the point of application of the input force
output lever arm
term for the distance from the fulcrum to the load
input work
term for the work done on a lever
law of levers
law that states that the input force times the length of the input lever arm equals the output force times the length of the output lever arm
mechanical advantage
term for the ability of a machine to multiply force
class 1 lever
type of lever in which the input force and load are located on opposite sides
class 2 lever
type of lever in which the input force and the load are located on the same side of the fulcrum
class 3 lever
type of lever in which the input force is between the fulcrum and the load
inclined plane
simple machine that allows heavy objects to be raised by sliding or rolling them along a slope
block and tackle
term for a device that uses several pulleys in combination
efficiency
term for the output work divided the input work