Calculating Centripetal Acceleration of a Locomotive's Crank Pin

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Homework Statement

A locomotive is running at a constant speed of 100 km / h. The diameter of driving wheels is 1.8 m. The
stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin relative to the engine frame.

Relevant Equations

v = omega * r

Problem Statement: A locomotive is running at a constant speed of 100 km / h. The diameter of driving wheels is 1.8 m. The
stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin relative to the engine frame.
Relevant Equations: v = omega * r

A locomotive is running at a constant speed of 100 km / h. The diameter of driving wheels is 1.8 m. The
stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin relative to the engine frame.

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[jbriggs444]

You've stated the problem. And you've written down an equation.

What would you do next if you had an equation involving two known quantities and one unknown quantity?