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| To demonstrate the principle of the screw jack and to determine the relationship between friction and mechanical efficiency. Comprises a heavy cast iron base supporting a steel screw jack. Top of the jack carries an aluminium pulley of dia. 100 mm Another smaller pulley of dia. 38 mm with rod is held by a bosshead to the rod for guiding the cord from the main pulley. Overall height approx. 200 mm. Supplied with cord but without masses. |
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