5
Caution of Pendulum Apparatus during the experiment
Caution of Pendulum Apparatus during the experiment
Caution of Pendulum Apparatus during the experiment
Caution of Pendulum Apparatus during the experiment
1. Position of weights
If the weights are hooked like in Fig.1, they may cause errors in the experiment. When using
several weights in the experiment, hook them like in Fig.2 in order to align the center of weights
(see Fig.1 & 2).
2. Length of Pendulum (thread length)
Common mistake in measuring the length of pendulum is: measuring the length from the bottom
vertex of a triangle, where weight is hooked (V shape) to the bottom surface of the rod (see
Fig.3). The correct length of pendulum is from the center of weight to the bottom surface of the
rod – red line (see Fig. 4). You should use the vertical line distance in Fig.4 as the correct length
of pendulum.
[ Fig.1 ] [ Fig. 2 ] [ Fig. 3 ] [ Fig. 4 ]
C
C
C
Complete
omplete
omplete
ompleted
d
d
d Apparatus
Apparatus
Apparatus
Apparatus
Lever mode Pendulum mode