If rod CD is rotating with an angular velocity vCD = 4 rad>s, determine the angular velocities of rods AB and CB at the instant shown.

Lecture 6: Dimensions and Units Outcomes Explain the difference between units and dimensions List the base (fundamental) dimensions in the SI system Identify derived dimensions and units Perform dimensional homogeneity checks on equations Explain the concept and use of dimensionless numbers Use common prefixes and prefix symbols o Table 2.6 on page 28 in text Dimensions vs units Dimensions o Used to describe or specify the nature of physical quantities o There are base and derived dimensions o Dimensions are independent of units o Examples: length, mass, force, velocity, voltage Units o Standard measure of the magnitude of a dimension with a predet