Bedienungsanleitung Knex 78610 - Education Intro to Levers and Pulleys Teachers Guide (Seite 17 von 62) (Englisch)

679357

Zoom out

Zoom in

Vorherige Seite

1/62

Nächste Seite

Teacher’s Notes

The children should be aware of the

weight, or force, made by the weighted

paper cup on their hand. The activity

also provides an opportunity to

introduce children to the idea that

weight is also a force. The effect of

using a weight is the same as pushing

down with a finger.

It may be useful to create a word

board with cards that have the word

on one side and a short explanation

on the reverse side for children to use

when needed.

Working in Groups of 2-3

 •Askeachgrouptopreparestickersandlabeltheir

seesaw model.

F - Fulcrum

L – Load

E – Effort

Each group will need 2 paper cups (or pieces of foil) and

some weights (paper clips/coins/standard weights).

1. Feel the load:

 •Askonechildfromeachgrouptoplacethebackoftheir

hand and arm on the desktop. Another member of the

group then places the paper cup/foil containing the

weights on the fingers of their partner’s hand who then

lifts the cup up from the surface of the desk. Each child

tries the exercise in turn.

   •Whatdidtheyfeel?

   •Didthecupfeelheavy?

2. Use the lever:

 • Askeachgrouptoplacetheweightedpapercupatone

end the seesaw. What happens to the end of the seesaw

with the load attached to it? Each child in turn pushes

down at the opposite end and notices what happens to

the load. Possible questions to ask:

  •Diditfeeleasierormoredifficulttolifttheweighted

paper cup this time?

  •Whatwasthedirectionmovedbytheirpush(effort)?

  •Whatwasthedirectionmovedbythepapercup(load)?

 • Askthechildrentotaketheirlabelsandplacethemin

the appropriate locations on the model to identify the

fulcrum, load and effort. Ask the groups to make and

add two arrow labels to their models to show the

direction of movement of the effort and load forces.

An alternative method is to wrap the

weights/coins in foil and attach the foil

parcels to the seat of the seesaw with

an elastic band. If you use elastic

bands in the classroom please review

the safety guidelines, outlined at the

beginning of this guide, regarding

their safe use by the children.

Talk about how one end of the seesaw

goes down when the weighted paper

cup is placed at the load end but will

not move until there is a push (an

applied effort) at the opposite end.

To lift the load up they must push

down. In other words, the lever has

helped change the direction of the

movement and the applied force. The

use of the directional arrows may help

the children visualise what is happening

as they record their observations and

make labelled drawings of their model.

Lesson�2.1�and�2.2:�The�Seesaw

Education

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Knex 78610 - Education Intro to Levers and Pulleys Teachers Guide Seite 17

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Andere Handbücher von Knex 78610 - Education Intro to Levers and Pulleys Teachers Guide

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info