Question

Why do we keep frequency constant instead of keeping vibrating length constant to verify
second law of vibrating string?​

Answer 1

Answer:

why not

Explanation:

ok understand why not

Answer 2

Answer:

While verifying the 2nd law of vibrating string experimentally, we vary the tension of the string by attaching weights in increasing magnitude on the hanger due to which the vibrating length at which the paper rider falls off, keeps changing as well and can't be kept as a constant.