Unit 2B Work, MA, Efficiency

exerting a force on an object that causes the object to move some distance

• work

• power

• mechanical advantage

• efficiency

the amount of work you do when you exert one Newton of force to move the object one meter

• joule

• newton

• meter

• output force

a device that allows you to do work in a way that is easier

• machine

• compound machine

• work

• power

the force you exert on the machine

• input force

• output force

• efficiency

• mechanical advantage

the force the machine exerts on an object

• input force

• output force

• efficiency

• mechanical advantage

the ratio of output force to input force

• work

• mechanical advantage

• efficiency

• power

the percentage of the input work that is converted to output work

• mechanical advantage

• efficiency

• joule

• machine

a simple machine that is a flat, sloped surface

• inclined plane

• wedge

• lever

• fulcrum

a rigid bar that is free to pivot, or rotate, on a fixed point

• wedge

• inclined plane

• lever

• fulcrum

the fixed point that a lever pivots around

• wedge

• inclined plane

• lever

• fulcrum