Magnetic blackboard model

This model offers two advantages: it perimits a graphis representation of equlibrium configurations , and utilizes magnetic elements which can be easily moved over the large surface of the magnetic blacboard.

1 Mettalic blackboard , 100cm x 100 cm, mounted on feet with levelling screws

1 Spring balance, 100 g

1 Six pulleys with magnetic pin for direct attachment to magnetic blackboard

1 Four magnetic pins for support of centimeter rule, spring balance, etc.

1 One helical spring with pointer.

1 One centrimeter rule with holes. The holes are spaced 20 mm apart, and serve fort the support of the rule by means of the magnetic pins  or pulleys, or for the attachment of the spring balance and masses to the rule.

1 Two counterwigths for centimeter rule

1 Four low-friction pulleys with hook

1 12 masses of 25 g each

1 4 masses of 50 g each

1 Block and tackle with six pulleys

1 Counterwight for block and tackle

1 Counterweight for mobile pulley

1 5 plane figures for location of centre of gravity

1 10 rings

1 8 hooks

1 Cotton twine cord, 10 m

1 Package of plasticine

1 Case with compartments for storage of accessories

1 Set of instruction sheets.

For experiments with moments . Magnetic attachment

Metal construction, with hole for application of cord, hook for attachment of known masses.

Mass 100 K 2 g.