4:5 vocabulary

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Across
  1. 1. a short slender sharp pontined mental pin with a raised helical thread running around it and slotted head
  2. 4. a machine consisting two or more machines oporating togetoher
  3. 6. the point on which a lever rests or us supported and pivots.
  4. 7. rigid bar resting on a pivot used to help move a heavy or frimly load with one end when pressure is applied to the other.
Down
  1. 2. a piece of wood mental or some other matreial having on thick end.
  2. 3. a simple lifting machine consitling of a rope that unwinds from a wheel.
  3. 5. a wheel with a grooved rim around with a cord.