Friction Board

This apparatus is used to determine G by measuring the time of fall of a steel ball through a pre- determined distance..

The time taken being less than one second, a centi second/ milli second timer capable of measuring the time in fraction of seconds has to be used.

Comprises two units each of which is mounted on a plastic which can be clamped on a 12 mm diameter retort rod. Connections are taken out to 4 mm sockets. The solenoid unit has a metal core which facilitates prompt release of the sphere on de-energizing.

The gate switch comprises a hinged steel plate to hold against an adjustable contact by means of a small permanent magnet, the plate falls away promptly at the impact of falling steel ball. The apparatus is supplied with a solenoid unit, gate switch, Steel Ball 18 mm dia and a stand.

It is used to study the motion under the effect of gravity of two mass systems connected through a lightweight cord, one on either side of a simple pulley. This apparatus comprises 2 long metals rods, one rod having a well-balanced 10cm pulley mounted at its one end on near-frictionless bearings and threads at other end for attaching it to the second rod to get a total working length of 245cm. A scale 0- 245cm continues from the top of rod with pulley to the bottom of the second rod.

Complete set includes electromagnetic release arrangement, set of 2 pairs of masses, Loading Masses – 1g, 2g, 1g, table/ring brackets, wall mounting clamps and lightweight cord..
This apparatus comprises 2 long metals rods, one rod having a well-balanced 10cm pulley mounted at its one end on near-frictionless bearings and threads at other end for attaching it to the second rod to get a total working length of 245cm. A scale 0- 245cm continues from the top of rod with pulley to the bottom of the second rod.

Complete set includes electromagnetic release arrangement, set of 2 pairs of masses, Loading Masses – 1g, 2g, 1g, table/ring brackets, wall mounting clamps and lightweight cord.