Stock cars

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Across
  1. 4. Essential safety equipment worn on the head.
  2. 6. The part of the car that produces power and thrust.
  3. 7. The oval dirt track where superstock cars race.
  4. 8. The force between the tyres and track that provides grip.
Down
  1. 1. The force that pulls the car toward Earth.
  2. 2. A heavily armoured race car designed for contact racing.
  3. 3. The person who controls the race car.
  4. 5. The force that pushes a stock car forward.