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Work Done By Variable Force ( SMT-MM-21)
Table unit for experiments on mechanical work
and potential energy.
Lifting a weight using a lever and a dynamo-meter
Integrated angle measuring scale (protractor).
2 set of weights.
Both experiments catered for on individual sides
of back board.
Spring balance 0…60N.
This experiment is designed to reinforce the general principle that the work done,
particularly by a variable force, can be determined simply by measuring the area under the
graph of force and distance moved. It forms a good introduction to simple machines, leading
to later studies on machine performance. The apparatus is a simple lifting mechanism with
obvious non-linear characteristics. A suspension cord carrying a loaded trolley at mid span is
tensioned by passing the cord over a pulley at one end and down to a weight hanger. As the
vertical effort is increased, the tensioned cord will move to a new equilibrium position lifting
the loaded trolley. Heights of the load and effort are measured relative to the base. All the
pulleys are fitted with ball bearings to minimise friction effects.