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An astronaut on the moon wishes to calculate the local g in the area. He sets up a wire with a mass of 1.7 grams and hanging from it an object with mass 4.98 kg. He sends some kind of pulse down the wire and calculates that it takes 40.86 ms to traverse the wire. What is g? You can neglect the mass of the wire when calculating the tension.
That was everything that was given in the problem. I have not a clue how to solve it. What I did was just use the equation of T=2pi[sqrt(l/g)] to solve for g and hope that the wire acts like a spring or something.
I’m totally sure that’s incorrect, but hey I’m not an astrophysicist.
(Response from Members and visitors awaited)
Posted by Ashish Dharva
- Change in resistance of a wire on stretching (askphysics.com)