5 Written Questions

1. ramp
2. can change position
3. output force is in the middle
4. tool used for splitting in half
5. factor by which the machine makes work easier

5 Matching Questions

1. third class lever
2. electron
3. force
4. insulators
5. static discharge

1. a charges that build up as static electricity on an object, electrons tend to move returning the object to its neutral condition
2. b input force is in the middle
3. c electrons cannot transfer easily (polarization)
4. d a push or a pull on an object
5. e negative charge

5 Multiple Choice Questions

1. force that pulls object with mass toward the earth
   1. machine
   2. gravity
   3. output
   4. input
2. use ropes and at least one fixed object to move a load
   1. pulley
   2. load
   3. lever
   4. screw
3. output force
   1. work
   2. thread
   3. power
   4. load
4. downward force due to gravity
   1. lever
   2. weight
   3. input
   4. effort
5. work output/work input x 100
   1. percent difference
   2. percent efficiency
   3. potential energy
   4. acceleration

5 True/False Question

1. contact force → force that happens when two objects touch
   

   True        False

2. linear motion → neutral charge
   

   True        False

3. work equation → mass x acceleration
   

   True        False

4. non-contact force → force that happens when two objects touch
   

   True        False

5. load → when a force moves an object
   

   True        False