Learning Goal:

An articulating arm is in the position shown in $($Figure $1),$ where $L_1=0\mathrm{.}8m,L_2=1m,{}_1=58,$ and ${}_2=26.$ Link $AB$ is rotating clockwise at $0\mathrm{.}9ra\frac{d}{s}.$ What angular velocity does link $BC$ have if $C$ is moving horizontally? How fast is point $C$ moving?

Figure $1$ of $1$

Part A

What is the vertical component of the velocity of point $B?$ Let a positive velocity be up$.$

Express your answer to three significant figures with appropriate units.

View Available Hint$($s$)$

$$

Previous Answers

Correct

Part B

What is the required angular velocity for $BC$ so that the vertical component of the velocity at $C$ is zero? Let a clockwise angular velocity be positive.

Express your answer to three significant figures with appropriate units.

View Available Hint$($s$)$

${}_{BC}=\frac{\text{r}\text{a}\text{d}}{(S)}$