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Pulley

Description

Students recognize the pulley in daily life machines, such as the well and the elevator. They understand the critical points of its operation.

Learning objectives

  • It understands the function of the pulley.

  •  Connect engineering to life.

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Suggested age group

1st Grade - 2nd Grade

Time

45 minutes

Fields in S.T.E.A.M.

  • Mechanics

  • Mathematics

Materials

  • The cylinder on which the ribbons are wrapped up can become an ideal pulley.

  • Chopsticks

  • Rope or twine

  • Paper tape

  • Plastic glass

  • Scissors

Steps

1

Students observe and describe a well, and they make hypotheses about how it might work.

2

Then they learn about the elevator, which works with a similar mechanism. The class asked to identify what these machines have in common: where is that they both carry a significant amount of weight

3

Students make their pulleys using chopsticks, tape, plastic glass, rope, and an old ribbon package.

4

By rotating the shaft to one side, they observe that the rope turns around the pulley and lifts the plastic glass upwards.

5

Instead, as they rotate the shaft in the opposite direction, the rope is released, and the plastic glass descends.

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