simple machines

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Across
  1. 3. Any of the basic mechanical devices for applying a force
  2. 5. A wheel, with a grooved rim for carrying a line, that turns in a frame or block and serves to change the dirrection of or to transmit force
  3. 7. The wheel and axel is generally considered to be a wheel attatched to an axel so that these two parts rotate together in which a force is transfered from one to the other
Down
  1. 1. The ratio of the force applied to it, used in assessing the performance of a machine
  2. 2. A bar that pivots on a fixed support, or fulcrum, and is used to transmit torque
  3. 4. A flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load
  4. 6. The measure of how muck more work must be put into a machine than you get out of the machine
  5. 7. The product of a forxe applied, and the distance through which that force acts