Question

A and B are the endpoints of a diameter of a disc rolling along a straight line with a counterclockwise angular velocity as shown in figure. Referring to the velocity vectors ${\overrightarrow{V}}_{A}and{\overrightarrow{V}}_B$ shown in the figure

• A. ${\overrightarrow{V}}_{A}and{\overrightarrow{V}}_B$ are both correct
• B. ${\overrightarrow{V}}_A$ is incorrect but ${\overrightarrow{V}}_B$ is correct
• C. ${\overrightarrow{V}}_{A}and{\overrightarrow{V}}_B$ are both incorrect
• D. ${\overrightarrow{V}}_A$ is correct but ${\overrightarrow{V}}_B$ is incorrect

Answer 1

The correct option is C ${\overrightarrow{V}}_{A}and{\overrightarrow{V}}_B$ are both incorrect


${\overrightarrow{V}}_A={\overrightarrow{V}}_C+{\overrightarrow{V}}_{A/C}$
${\overrightarrow{V}}_B={\overrightarrow{V}}_C+{\overrightarrow{V}}_{B/C}$