EXPERIMENT NO. 1
The aim of this experiment is to determine the mass of a
given dry cell, size “AA”
Your provided with a dry cell, a knife edge, two weights
50g and 20g and a metre rule
Proceed as follows;
(a) Locate and note the centre
of gravity C of the metre rule by balancing on the knife edge
(b) Suspend the 50g mass on one
side of the metre rule and 20g together with a dry cell on the other side of
the metre rule adjusting their position until the metre rule balances
horizontally as shown in the figure below
(c) By fixing a = 10cm
from C, find its corresponding length, b from C
(d) Repeat and tabulate your
results using a = 15cm, 20cm, 25cm and 30cm.
(e) Draw a graph of “a”
against “b” and calculate the slope G
(f) Calculate X from equation $$X={50G-20}$$
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