Work and Machines: Vocabulary Matching

 1.  compound machine a. grooved wheel with a rope, chain or cable running along the groove
 2.  efficiency b. inclined plane wrapped in a spiral around a cylindrical post
 3.  inclined plane c. transfer of energy that occurs when a force makes an object move
 4.  input force d. sloping surface that reduces the amount of force required to do work
 5.  lever e. amount of work done per unit of time
 6.  machine f. measures how much work put into a machine changes into useful output
 7.  mechanical advantage g. simple machine that consists of an axle attached to the center of a wheel
 8.  output force h. ratio of the output force to the input force
 9.  power i. force applied by machine
 10.  pulley j.  force applied to machine
 11.  screw k. machine that does work with only one movement of the machine
 12.  simple machine l. bar that is free to pivot or turn around a fixed point
 13.  wedge m. combination of two or more machines
 14.  wheel and axle n. inclined plane with one or two sloping sides, can be used for cutting
 15.  work o. device that makes doing work easier
Match the units
16. joules a. power
17. watts b. force
18. seconds c. distance
19. newtons d. work
20. meters e. time