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13 Cards in this Set

  • Front
  • Back
Work
the transfer of energy that occurs when a force makes an object move
Machine
a device that makes doing work easier
Effort force
the force applied to a machine
Resistance force
the force applied by the machine to overcome resistance
Mechanical Advantage (MA)
the number of times the machine multiplies the effort force
Efficiency
how much of the work put into the machine is changed into useful output work by the machine
Simple machine
a machine that does work with only one movement
Lever
a bar that is free to pivot, or turn, about a fixed point
Pulley
a grooved wheel with a cable, rope, or chain running along the groove
Wheel and axle
a machine consisting of two wheels of different sizes that rotate together
Inclined plane
a sloping surface that reduces the amount of work required
Wedge
an inclined plane with one or two sloping sides
Compound Machine
when two or more simple machines are used together