Pendulum Katers

This kit is used to understand the concept of elasticity by students.
The kit comprises 2 wide steel springs of 4 turns 50 mm dia, 25, expandable steel springs with ends bent to form hooks, foam blocks 130 x 50 x 50 mm, one 50 gms reel of 32.S.W.G. copper wire, two 50 gms reels of 26 SWG bare copper wire, one meter length of latex rubber tubing, 4 elastic cords with eyelets and 4 soft erasures for twisting.

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.