Course:              Science & Technology, Grade 8

Teacher:             De Simone

Due Date:           Friday, June 23, 2017

 

Assignment:  Build your own Elevator

 

Overview:

A pulley is a simple machine consisting essentially of a wheel with a grooved rim in which a pulled rope or chain can run to change the direction of the pull and thereby lift a load.  Pulleys can be used to simply change the direction of an applied force or to provide a force/distance tradeoff in addition to a directional change. 

 

A compound pulley `trades' force for distance through an action/reaction force pair. In a double pulley, as the rope passes over the pulley the force is transmitted entirely but the direction has changed. The effort is now pulling up on the left side of the bottom pulley.

 

Project Rationale:

The purpose of this project is to show that an elevator (a system of ropes and pulleys) may be the best way to lift heavy object without help, or at least, with minimal help.

 

Project Deliverables:

The elevator structure:

 

Project Materials:

You can use the following:


Elevator Rubric        Name:_______________

 

 

BELOW

AVERAGE

1

 

AVERAGE

2

ABOVE

AVERAGE

3

 

EXCEPTIONAL

4

Teamwork

 

One member dominates the group. Team is not functional

 

Team members

collaborate, engage in positive, supportive

discussion, or

involve all team

members

Team members

collaborate, engage in positive, supportive discussion, and/or involve all team members

Team members

collaborate, engage in positive, supportive discussion, and

involve all team

members

Idea/Strategy

Design Plan

- Plan does not show measurements clearly or is otherwise inadequately labeled

-  Design solution demonstrates a low level of creativity and ingenuity. No creativity or ingenuity.

- Plan provides

clear measurements

and labeling for

most components

-  Design solution

demonstrates an average level of

creativity and ingenuity.

- Plan is neat with

clear measurements

and labeling for

most components

-  Design solution

demonstrates

an above average level of creativity and ingenuity.

- Plan is neat with

clear measurements

and labeling for

all components

-  Design solution

demonstrates an

exceptional

level of creativity and ingenuity.

Execution/

Craftsmanship

 

Elevator has

many stray

marks and

smudges,

tears, wrinkles,

creases, and

frayed edges. No care and very little attention to detail.

Elevator has

some stray

marks and

smudges, tears,

wrinkles, creases, and frayed edges. Minimal care and some  attention to detail.

Elevator has

few stray marks

and smudges,

tears, wrinkles,

creases, and frayed edges.  Care and attention to detail.  Some case and attention to detail.

Elevator is free

from stray

marks and

smudges, tears,

wrinkles, creases, and frayed edges.  Extreme care and attention to detail.

Construction - Materials

Inappropriate

materials were

selected and

contributed to a

product that performed poorly.

 

Appropriate

materials were

selected and there was little or no attempt at creative

modification to make any improvements.

Appropriate

materials were

selected and there was an attempt at

creative modification to make them even

better.

Appropriate

materials were

selected and

creatively modified in ways that made them even better.

Scientific Knowledge

Explanations by

several members of the group do not

illustrate much

understanding of

scientific principles

underlying the

construction and

modifications.

Explanations by

most group

members indicate

relatively accurate

understanding of

scientific principles

underlying the

construction and

modifications.

Explanations by

all group members

indicate a relatively

accurate understanding of

scientific principles

underlying the

construction and

modifications.

Explanations by

all group members

indicate a clear

and accurate

understanding of

scientific principles

underlying the

construction and

modifications.

 

 

Grade:                      /25


Weight Results - Elevator Chart

Elevator Structure Testing

(date/time)

Actual Weight

(kilogram)

1.  (also include a description of any modifications, between tests)

 

 

1 k (minimum)

2.

 

 

 

3.

 

 

 

4.

 

 

 

5.

 

 

 

6.

 

 

 

7.

 

 

 

8.

 

 

 

9.

 

 

 

 


 

Observation:

What happens when you turn the spindle? Does your elevator car move up? Does it move down? How do you think the counterweight affects the movement of the elevator car? What do you think would happen if you added some weight (to mimic people) inside the elevator car?

 

 

 

 

 

 

 

 

 

 

 

 

 

Results:

When you turn spindles, the string attached is wound or unwound, resulting in the elevator car moving up or down. The counterweight is used to balance the weight of the elevator car so it's easier to pull up. As the elevator is lifted up, the counterweight moves down and the elevator rises.