PLZ HELP!! MEDAL AND FAN!!

Question

anonymous · Answer

8.  Which of the following describes effort force? (Points : 3)  
       force put out by the machine
        force used by the machine
        force applied to the machine
        force used to change the direction of the motion
 
      



9.  Which of the following is an example of an incline plane? (Points : 3)  
       lever
        gear
        pulley
        screw
 
      



10.  A doorknob is an example of which simple machine? (Points : 3)  
       lever
        pulley
        inclined plane
        wheel and axle
 
      



11.  A drill bit is an example of which simple machine?
       screw
        lever
        pulley
        wheel and axle
 
      



12.  Which of the following simple machines does a person use when raising a flag up a flagpole? 
       lever
        wheel and axle
        wedge
        pulley
 
      



13.  An axe blade is an example of which simple machine?  
       lever
        wedge
        pulley
        inclined plane
 
      



14.  Which of the following describes what happens to the amount of work when using a ramp to move a heavy object? 
       increase
        decrease
        stay the same
        constantly changing
 
      



15.  What will occur if you increase the effort arm on a lever? 
       It will increase the amount of force needed.
        It will decrease the amount of force needed.
        It will not change the amount of force needed.
        The amount of force needed would vary.