What is the acceleration due to gravity?

[adrianagisela_]

Homework Statement

To measure the acceleration due to gravity on a distant planet, an astronaut hangs a 0.055-kg ball from the end of a wire. The wire has a length of 1.5 m and a linear density of 3.1 multiplied by 10-4 kg/m. Using electronic equipment, the astronaut measures the time for a transverse pulse to travel the length of the wire and obtains a value of 0.085 s. The mass of the wire is negligible compared to the mass of the ball. Determine the acceleration due to gravity.

Homework Equations

The Attempt at a Solution

 

[haruspex]

Do you have an equation for the speed of a wave in a string, based on its density and the tension? If not, try http://www.transtutors.com/physics-homework-help/waves/transverse-wave.aspx. (The 3/4 symbols should be equals signs.)