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Fourth Grade (Grade 4) Simple Machines Questions

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Grade 4 Simple Machines
Which letters represent the fulcrum, effort force, and load on the lever diagram?
First Class Lever
  1. Fulcrum = A; Effort = B; Load = C
  2. Fulcrum = C; Effort = A; Load = B
  3. Fulcrum = A; Effort = C; Load = B
  4. Fulcrum = B; Effort = C; Load = A
Grade 4 Simple Machines
What type of pulley is shown?
Movable Pulley
  1. fixed pulley
  2. movable pulley
  3. block and tackle
Grade 4 Simple Machines
What class lever is shown?
Second Class Lever
  1. first class
  2. second class
  3. third class
Grade 4 Simple Machines
Lucas uses a screwdriver to pry the lid off a paint can. In this situation the lid is an example of a(n)                .
  1. load
  2. fulcrum
  3. lever
  4. effort
Grade 4 Simple Machines
The pitch is the distance between each thread on a screw.
  1. True
  2. False
Grade 4 Simple Machines
What class lever is shown?
First Class Lever
  1. first class
  2. second class
  3. third class
Grade 4 Simple Machines
A load can be moved most easily when the fulcrum is farthest from the load.
  1. True
  2. False
Grade 4 Simple Machines
What type of pulley is shown?
Pulley System
  1. fixed pulley
  2. movable pulley
  3. block and tackle
Grade 4 Simple Machines
Crystal must lift a bucket of water 1 meter off the ground. She may lift the bucket herself or use the pulley system shown. Which will require less effort to lift the bucket?
Pulley System
  1. Crystal lifting the bucket on her own would require less effort.
  2. Crystal using the pulley system to lift the bucket would require less effort.
  3. Crystal must use the same effort if she lifts the bucket or uses the pulley system.
Grade 4 Simple Machines
Why do people use simple machines?
  1. Machines make things smaller.
  2. It does the work for people.
  3. It makes work easier.
  4. Machines are more accessible.
Grade 4 Simple Machines
Provide an example of each of these:
pulley            flagpole           
inclined plane        ramp       
lever           see saw          
Grade 4 Simple Machines
A sack of potatoes on a steeply slanted board will move more easily compared to a stack of potatoes on a level surface.
  1. True
  2. False
Grade 4 Simple Machines
The steeper the incline of an inclined plane, the more         force         is needed to hall something up it.
Grade 4 Simple Machines
The           Smaller           the thread on a screw, the        less       force is needed to move the load.
Grade 4 Simple Machines
The longer the           Incline          , the        less        effort is needed to move an object up a ramp.
Grade 4 Simple Machines
A child has a box of comic books she got from a garage sale. She brought the books home in a wagon, but she can't carry the box up the steps into the house. Make a decision about which simple machine she can construct that will help her get the box of comics up the steps.
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