Required Shear Strength Rotation

#Required adhesive strength to hold given mass to lever arm.
def req_shear_str( mass,area, radius, dt,d_theta_deg ):
    dist = 2.0*pi*radius * d_theta_deg/360.0
    vel = dist / dt
    force = mass * vel*vel / radius
    strength = force / area
    print("N / sq m, N / sq mm, PSI:")
    print(strength, strength*1e-6, strength*0.000145038)