A200 hz tuning fork is sounded at the same time as a guitar string and a beat frequency of 4 hz is heard. which of the following could be the natural frequency of the guitar string? (a) 192 hz, (b) 196 hz, (c) 200 hz, (d) 208 hz, (e) 800 hz.

Explanation:

It is given that,

Frequency of the tuning fork, f₁ = 200 Hz

Beat frequency,

The difference of frequencies is called the beat frequency of the tuning fork. It is given by :

or

So, the correct option is (b) "196 hertz". Hence, this is the required solution.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.