youngs modulus

cowgiljl

A truck is pulling a car out of a ditchwith a steel cable that is 9.1 meters long and has a radius of .5cm. When the car just begins to move the tension of the cable is 890N. How much has the cable stretched?
converted .5cm to .005m
area of the wire A = pie*r^2
Y = 20E10 (steel)
used the formula Change in L = F*orginal length/YA

Change in L = 890N*9.10m / 20E10* (pie*.005^2)

and got 5.2E-4 m

did i go about this correctly?

thanks joe

Doc Al

Looks OK to me.

Silverious

Now, is this cable apple, or cherry pie?

I'm sorry I couldn't resist [:D]