a particular machine requires a helical compression spring, having ends squared and ground, to support an essentially static load of 750 lb. the spring constant is to be 200 lbf/in. and the stress at the design load is to be 95 ksi. the clash allowance is to be 0.25 in. the dimensions of related parts establish that d should be 3.2 in. determine n, d, and lf.
