What is the empirical formula for the tractive force required to overc – McqOptions

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1.	What is the empirical formula for the tractive force required to overcome curve resistance? (W-the weight of the body, R radius of curvature)
A.	710 W R
B.	700 W R
C.	720 W R
D.	750 W R
Answer» C. 720 W R

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