Forces, Motion and Energy

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Across
  1. 2. the acceleration of an object depends on the mass of the object and the amount of force applied.
  2. 6. a simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp.
  3. 7. the work done on a machine; the product of the input force and the distance through which the force is exerted.
  4. 9. the unit of measurement used to express energy; equivalent to the amount of work done by a force of 1N (newton) acting through a distance of 1 m (meter) in the direction of the force (newton-meter).
  5. 10. a force of attraction between objects that is due to their masses
  6. 11. all forces act in pairs; one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
  7. 12. a simple machine that is made up of two inclined planes and that moves; often used for cutting.
  8. 14. a number that tells how many times a machine multiplies force. MA = output force/input force
  9. 17. a measure of the gravitational force exerted on an object (value can change in universe)
  10. 18. the amount of work an object can do because of the object’s kinetic and potential energy.
  11. 20. a simple machine consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects.
  12. 21. the SI unit for force (symbol, N)
  13. 22. a simple machine that consists of a wheel over which a rope, chain, or wire passes.
  14. 25. the unit of measurement used to express power; equivalent to joules per second.
  15. 26. a quantity, usually expressed as a percentage, that measures the ratio of work output to work input. ME = work output/work input x 100
  16. 28. a machine made of more than one simple machine
  17. 30. the ability to do work
  18. 32. the work done by a machine; the product of the output force and the distance through which the force is exerted
  19. 33. a device that helps do work by either overcoming a force or changing the direction of the applied force
Down
  1. 1. a machine that has 100% efficiency; impossible to build due to moving parts/ friction.
  2. 3. a simple machine that consists of a bar that pivots at a fixed point called a fulcrum
  3. 4. the law that states that energy cannot be created or destroyed but can be changed from one form to another.velocity – the speed of an object in a particular direction
  4. 5. a force that opposes motion between two surfaces that are in contact
  5. 8. a simple machine that consists of an inclined plane wrapped around a cylinder.
  6. 13. a measure of the amount of matter in an object.
  7. 15. an object at rest remains at rest, and an object in motion remains in motion at a constant speed and in a straight line unless acted on by an unbalanced force.
  8. 16. the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change.
  9. 19. the energy that an object has because of the position, shape, or condition of the object.
  10. 23. a push of pull exerted on an object in order to change the motion of the object; has size and direction.
  11. 24. a change from one form of energy to another
  12. 27. energy the energy of an object that is due to the object’s motion.
  13. 29. the rate at which work is done, or energy is transformed (P = W/t)
  14. 31. the transfer of energy to an object by using a force that causes the object to move in the direction of the force (Work = Force x Distance or W = FD).