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•
Using no mass on the stage displace the apparatus
slightly so that the stage vibrates horizontally.
•
Record the period for 10 oscillations.
•
Do three measuring runs, then average the
results.
The period T of one oscillation is the time taken
between the stage passing through its mid point, and
the next time it passes through the same point,
moving in the same direction.
•
Repeat this process using as many different
combinations as possible of the three masses
supplied.
•
Put your results into a table.
•
Plot a graph of period T against mass m.
•
Repeat the experiment with the unknown mass,
and use the graph to find the magnitude of this
mass.
The inertia balance is actually a compound spring
system. The period of an oscillating spring is given by
the equation
m
2
=
π
2
⋅
T
4
D
where T = period, m = mass on the spring, D = the
spring's elasticity constant.
•
2
Plot a graph of T
against mass.
•
Determine the elasticity constant D from the slope
of the graph.
•
Calculate the unknown mass m from the equation (1).
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
(1)
Subject to technical amendment
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www.3bscientific.com
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