Question

Why does increasing the length of the string cause the angle of the pith balls to decrease?​

Answer 1

Answer:

However, increasing the string length while keeping the same angle moves the balls farther apart, decreasing Fq. Therefore, the angle must decrease as the length increases.

Answer 2

Answer:

The weight of the pith balls (Fg) remains constant in this experiment, so for the angle to remain the same Fq would also have to remain the same as the string length increased. However, increasing the string length while keeping the same angle moves the balls farther apart, decreasing Fq.