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5 Written questions

5 Matching questions

  1. Machine
  2. Balanced Forces
  3. Distance
  4. Newton's 3rd Law of Motion
  5. Magnetism
  1. a When 2 objects exert an equal and opposite force on each other.There is no movement!
  2. b a tool or device that makes work easier by changing the direction or the amount of force needed to move an object; DOES NOT make less work.
  3. c how far an object moves
  4. d a force that attracts certain metals and other magnets without touching; push or pulls on other objects
  5. e When the 1st object puts a force on a 2nd object, the 2nd object will put a force back on the 1st object as well. Exam: using a hammer to pound a nail, the hammer is creating a force on the nail and the nail is creating a force back on the hammer.

5 Multiple choice questions

  1. ends of magnets and the North Pole and South Pole: Positive & Negative poles, opposites attract (a + and - or (North & South); like poles repel (push away: South & South, North & North, 2 + or 2-)
  2. When a force acts on an object and causes it to move (may be in the same direction or in opposite directions).
  3. work is done in a certain time. Work divided by time = power; measured in Watts
  4. An object in motion will stay in motion unless a force acts on it. An object at rest will stay at rest unless a force acts on it.(No Net Force)
  5. the force that slows down objects by rubbing against them

5 True/False questions

  1. Velocitythe speed & direction of an object's motion

          

  2. Accelerationthe rate when velocity changes over time

          

  3. Unbalanced ForcesWhen 1 object exerts more force on another object and movement occurs. Forces may be in the same direction or opposite directions, but there is movement. There is a Net Force.

          

  4. Worka push or pull that acts on an object

          

  5. Forcea force that moves an object; no work is done if an object doesn't move. Force X Distance = Work