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Eighth Grade (Grade 8) Simple Machines Questions

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Grade 8 Simple Machines
In a class 1 lever (like a see-saw), what happens to the load when your effort is pushing down?
  1. It goes up.
  2. It goes down.
  3. It doesn't move.
Grade 8 Simple Machines
How do you increase the mechanical advantage of an inclined plane?
  1. Increase the height of the inclined plane.
  2. Increase the output force.
  3. Decrease the length of the inclined plane.
  4. Increase the length of the inclined plane.
Grade 8 Simple Machines
How does a ramp make work easier?
  1. By giving you more output work than you input
  2. By giving you more output force than you input
  3. By giving you less output work than you input
  4. By changing the direction of your force
Grade 8 Simple Machines
How do you increase the Mechanical Advantage of a lever?
  1. Move the fulcrum closer to the output force.
  2. Move the fulcrum closer to the input force.
  3. Increase the output force.
  4. Put the fulcrum equal distance from the output and input forces.
Grade 8 Simple Machines
A wheelbarrow, pulley, and wedge are all examples of what?
  1. levers
  2. inclined planes
  3. simple machines
  4. wheels and axles
Grade 8 Simple Machines
Which of the following ALWAYS increases your force?
  1. Type 1 lever
  2. Type 2 lever
  3. Type 3 lever
  4. Type 4 lever
Grade 8 Simple Machines
Which of the following units are used to express mechanical advantage?
  1. Watts
  2. Joules
  3. Newtons
  4. None of the above
Grade 8 Simple Machines
Which is true about a class 2 lever?
  1. It increases force.
  2. It decreases force.
  3. It changes direction of force.
  4. All of the above.
Grade 8 Simple Machines
A machine can transform energy.
  1. True
  2. False
Grade 8 Simple Machines
A machine can change the direction of a force.
  1. True
  2. False
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