The IGCSE class is determining the mass of a metre rule using two methods.
Method 1.
Fig. 1.1 shows the apparatus used
A student places a 100 g mass X on the rule so that its centre is at a distance d = 5.0 cm from
the zero end of the rule, as shown in Fig. 1.1. He adjusts the position of the rule so that it is
as near as possible to being balanced.
He measures the distance x from the centre of the mass X to the pivot and the distance y
from the pivot to the 50.0 cm mark on the rule.
He repeats the procedure using d = 10.0 cm.
The readings are shown in Table 1.1.
Table 1.1
d/cm
|
x/cm
|
y/cm
|
5.0
|
23.7
|
21.1
|
10.0
|
21.0
|
18.5
|