- #1

rayhan619

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## Homework Statement

To measure the acceleration due to gravity on a distant planet, an astronut hangs a 0.055 kg ball from the end of a wire. the wire has a length of 0.95 n and a linear density of 1.2*10

^-14 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 0.016 s. the mass of the wire is negligible compared to the mass of the ball.

a) draw a nice picture

b) calculate the velocity of the pulse

c)determine the acceleration due to gravity

## Homework Equations

f = v/2L

v = (Mg/mu)^sq. root

## The Attempt at a Solution

m = 0.055 kg

L = 0.95 m

mu = 1.2*10^-4 kg/m

T = 0.016 s

b)f = 1/0.016s = 62.5 hz

v = 2fL = 2*62.5 hz*0.95 m = 118.75 m/s

c)g = (v^2*mu)/M = {(118.75 m/s)^2*1.2*10^-4 kg/m}/0.055 kg = 30.77 m/s^2

i got both of them wrong. where did i screw up?