Available Answers

1. 1.

   Choose the correct answer.

   1. A stapler is an example of a 
      1. first-class lever
      2. second-class lever
      3. third-class lever
      4. pulley
   2. A flyover uses the principle of a / an
      1. lever
      2. wedge
      3. inclined plane
      4. pulley
   3. A wheel and axle is used in a / an
      1. sewing machine
      2. flagpole
      3. ramp
      4. axe
   4. An inclined plane wounded around a rod is called
      1. pulley
      2. screw
      3. wedge
      4. lever
   5. The simple machine used to draw water from a well is a 
      1. wedge
      2. axe
      3. pulley
      4. screw
   6. The position of the load in a second-class lever is
      1. between the fulcrum and the effort
      2. on the same side of the fulcrum
      3. before the effort
      4. none of these
   7. An example of a third-class lever is a 
      1. see-saw
      2. broom
      3. fishing rod
      4. nut cracker
   8. Wheels with teeth are called
      1. threads
      2. gears
      3. pulleys
      4. string
2. 2.

   What makes our work easier and faster?
3. 3.

   Which class of lever is a nail cutter?
4. 4.

   What is the position of the effort in a third-class lever?
5. 5.

   Give an example of a wedge.
6. 6.

   What is a screw?