Question

What is the main source of error in the experiment using gravesands apparatus

Answer 1

The following can be the main source of error while conducting an experiment with the gravesands experiment:

1) presence of friction in the pulley

2) weight tied to the threads

Apart from these two main sources of error, there can also occur an error in marking the points in the experiment.

The friction problem in pulleys can be reduced or corrected by oiling the pulleys.