Velocity & Acceleration Diagram

$\text{O}$ is a fixed point.

Velocity Diagram

Notation

• $oa$ - Absolute velocity of point $\text{A}$
• $ab$ - Velocity of point $\text{B}$ relative to point $\text{A}$

Acceleration Diagram

Notation

• $o_1a_1$ - Absolute acceleration of point $\text{A}$
• $a_1b_1$ - Velocity of point $\text{B}$ relative to point $\text{A}$

Here:

• $a_1x_1$ - the radial component of the relative acceleration between A and B
• $x_1b_1$ - the transverse component of the relative acceleration between A and B