Mechanics Crossword Puzzle

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Across
  1. 2. Two or more forces can be combined and represented by a single ... force.
  2. 5. In ... collision, some kinetic energy is converted to heat and sound.
  3. 6. a device used to measure time
  4. 9. ... is the part of physics that deals with motion, force and energy.
  5. 11. a diagram to show the relationship between total input energy, useful output energy and wasted energy.
  6. 12. Newton's third law states that to every action, there is an equal but ... reaction.
  7. 15. Passenger cars have collapsible front and rear sections to reduce the force of ... in a collision.
  8. 18. Newton's first law states that a body remains in its state of rest or uniform motion unless it is acted on by an ... force.
  9. 21. If there is no ... resistance, a coin and a feather will fall at the same rate.
  10. 22. ... is the rate of work done.
  11. 25. Wind and tide are ... energy sources.
  12. 26. ... is the product of force and moment arm.
  13. 27. A ... uses sound waves for underwater ranging and detection.
Down
  1. 1. SI unit of length
  2. 3. The condition of equilibrium for rotational motion is that the sum of clockwise moments about any point is equal to the sum of ... moments about that point.
  3. 4. ... energy comes from the heat under the crust of the Earth
  4. 7. Newton's second law states that the ... force acting on a object is equal to the product of its mass and acceleration.
  5. 8. A moving object has ... energy.
  6. 10. SI unit of time
  7. 13. A body is in ... if it is at rest or in uniform motion.
  8. 14. Fish has ...-lined bodies to reduce friction in swimming
  9. 16. the short form of millisecond
  10. 17. unit of pressure
  11. 19. ... is the ability to do work.
  12. 20. A ... quantity has magnitude and direction.
  13. 23. the short form of potential energy
  14. 24. SI unit of force