\magnification=\magstep1

$$
\Delta(mg) \quad = \quad \Delta(m) * g
$$

$$
\Delta(ma) \quad = \quad (ma) \left( { {\Delta(m)\over(m)} + {\Delta(a)\over(a)} } \right) 
$$

$$
\Delta(T) \quad = \quad \Delta(mg) + \Delta(ma)
$$

$$
\Delta(\tau) \quad = \quad \tau \left( {{\Delta(R)\over(R)} + {\Delta(T)\over(T)}} \right)
$$

$$
\Delta(\alpha) \quad = \quad \alpha \left( {{\Delta(a)}\over(a)} + {{\Delta(R)}\over{R}}  \right) 
$$

$$
\Delta(I) \quad = \quad I \left( {{\Delta(\tau)}\over{\tau}} + {{\Delta(\alpha)}\over{\alpha}} \right) 
$$

$$
\Delta(I_{\rm weights}) \quad = \quad \Delta(I_{\rm bar.plus.weights}) 
                + \Delta(I_{\rm bar})
$$




\bye

