Science Simple Machines Quiz Flashcards
Work equation
W=fd
Work unit
J (joules)
Power equation
work done/ time needed
Power unit
W (watts)
Rework equation for work
W (top of the triangle), F (bottom left corner), D (bottom right corner)
Rework equation for power
W (top of the triangle), P (bottom left corner), T (bottom right corner)
Mechanical Advantage equation
MA= output force/ input force
Efficiency equation
output/input x100
Simple Machine vs. Compound Machien
A simple machine does work with only one movement, while a compound machine uses multiple movements since it’s a combination of multiple simple machines.
What are the 5 simple machines?
Lever, incline plane, pulley, wheel and axle, gears
Lever definition
any rigid rod or plank that pivots about a plank
Incline plane definition
flat sloped surface
Pulley definition
grooved wheel with a rope or chain wrapped around it
Wheel & axle definition
2 circular objects depending on their size to rotate together
Gears definition
2 or more wheels that fit together with interlocking teeth
Lever MA
distance from fulcrum to input/ distance from fulcrum to output
Incline plane MA
length of incline plane/ height of incline plane
Pulley (fixed) MA
MA= 1
Pulley (movable) MA
MA=2
Wheel & Axle MA
radius of the wheel/ radius of the axle
