Learning Task 4: Perform this activity on your answer sheet.
Activity Title: Constructing Simple Machine
Materials:
A-1-foot ruler
pencil
paperweight
B-paper
pencil
Procedures:
A. 1. Tape a pencil on your tabletop. Let this be the fulcrum.
2. Let a hard l-foot ruler rest on top of the pencil, with the 6-inch mark
right on the fulcrum.
3. Place the rectangular paperweight at the 5-inch mark.
4. Lift the weight by pressing your finger on points at the other side of the
fulcrum.
5. Observe where it will take less effort to lift the load-at points closer to
or farther away from the fulcrum?
B. 1. Cut a piece of paper into a triangle.
2. Wrap the paper around a pencil. See that the inclined plane "ramp"
of the paper is now spiraled around the length of the pencil. You now
have a paper model of a screw.
3. Starting from the end of your pencil, trace the thread of the screw with
your finger. See how your finger spirals its way up to the top of the
pencil
Questions:
Answer the following on your answer sheet.
1. What would happen if you used a triangle with a steeper incline?
2. What would happen if the triangle had a less steep incline?
3. How will new screws compare with the original screws?

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