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## Homework Statement

The soap-box car has a weight of 110 lb, including the passenger but excluding its four wheels. Each wheel has a weight of 5 lb, radius of .5 ft, and a radius of gyration k = .3 ft, computed about an axis passing through the wheels axle. Determine the cars speed after it has traveled 100 ft starting from rest. the wheels roll without slipping. Neglect Air.

## Homework Equations

T

^{1}= [tex]\sum[/tex]U

_{1-2}= T

_{2}

## The Attempt at a Solution

T

_{1}= 0 because it starts from rest

for T

_{2}the mass would be 110lb car pluss the 4 5lb wheels, converted to slugs of course, and the v is what i am looking for

im not sure about the middle term

I = mk

^{3}= .1554*.3

^{2}= .013986

What else do i need