1
Ratio of output work to input work
2
"How useful" a machine is; Ratio of output force to input force
3
According to Work Energy Theorem, work is equal to the change in _________________
4
Unpowered mechanical device that works by a single movement
5
Ramp at an angle to the horizontal; Aids in raising and lowering objects
6
Sign of work when it occurs in the SAME direction as an object's motion
7
Sign of work when it occurs in the OPPOSITE direction as an object's motion
8
When a machine has 100% efficiency (ignores friction, heat, air resistance, etc.)
9
Force overcome when lifting an object vertically
10
Mechanical system capable of performing work
11
Wheel with a rope passing through; Changes the direction of force
12
Whatever force or energy the machine produces or does for you
13
_________ and axle
14
Bar rotating on a fulcrum; Ex: see-saw
15
Converts rotational motion into linear motion; Fastens two things together
16
Unit for work (J)
17
Rate at which work is done or "speed of work"; Equal to work over time
18
Force that is applied by you; Everything you must do to make a machine work
19
Triangular tool used to separate objects; Ex: axe
20
Transfer of energy; Equal to force multiplied by distance
21
Unit for power (W)
