The Mousetrap Car!

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Across
  1. 2. Momentum is the product of the mass of a particle and its velocity.
  2. 5. A bar of shaft on which a wheel, pair of wheels, or rotating device revolves around.
  3. 7. The increase of speed or velocity.
  4. 10. Cardboard like plastic.
  5. 12. A device that allows constrained relative motion between two or more parts, typically rotational or linear motion.
  6. 13. The steel frame, wheels, engine, and mechanical parts of a motor vehicle, to which the body is attached.
  7. 15. Friction Resistance to movement of air flowing along the surface of the earth or other surface such as an airplane wing.
  8. 18. Alignment Being able to steer straight.
  9. 20. Of Mass The point at which the entire mass of the body may be concentrated for some purposes.
  10. 21. Washer Metal disk placed in between two moving parts.
Down
  1. 1. The speed and direction of a moving object.
  2. 2. A measure of the amount of matter contained in or constituting a physical body. Objects with mass interact with each other through the force of gravity.
  3. 3. Static friction, as of a wheel on a track or a tire on a road.
  4. 4. Advantage The force by which a mechanism multiplies the force and torque applied to it.
  5. 6. Output The amount of power given when energy is released.
  6. 8. Inertia Inertia is the resistance to the change of motion. Rotational inertia is the resistance to change of rotation, so the more rotational inertia an object has, the less it responds to being spun.
  7. 9. Transference of forces between machines or mechanisms, often with changes of speed and torque.
  8. 11. Energy The energy possessed by a body as a result of its condition or position rather than its motion. Stored energy.
  9. 12. A plain bearing that is inserted into a housing to provide a bearing surface for rotary applications.
  10. 14. The ratio of distance traveled by an object to the time required to travel the distance.
  11. 16. Friction Fluid friction occurs between layers of fluids that are moving relative to each other. The internal resistance to flow is described by viscosity (being 'thick' or 'thin').
  12. 17. Energy The energy possessed by a system or object as a result of its motion.
  13. 19. Distribution It is the apportioning of weight within a vehicle, especially cars, airplanes and trains.