The connecting rod is attached to the piston by a 20-mm-diameter pin at B and to the cra...

The connecting rod is attached to the piston by a 20-mm-diameter pin at B and to the crank shaft by a 50-mm-diameter bearing A. If the piston is moving upwards, and the coefficient of static friction at the contact points is = 0.3, determine the radius of the friction circle at each connection.