Consider $($Figure $1).$ The slider block A

is moving to the right at vA

$=12$ ft$/$s

$.$ Member CD

is pin connected to member ADB

$.$

Figure$1$ of $1$

Two straight links connect three slider blocks. Block $\text{'}$A$\text{'}$ moves horizontally to the right at v subscript $\text{'}$A$\text{'}.$ Blocks B and C are restricted to move vertically. Blocks $\text{'}$A$\text{'}$ and B are pin connected by member $\text{'}$A$\text{'}$ B which makes a $45$ degree angle with the horizontal, B is to the right and above $\text{'}$A$\text{'}.$ Block C is connected to member $\text{'}$A$\text{'}$ B by member C D with a length of $2$ feet, pin D is $2$ feet from $\text{'}$A$\text{'}$ and B on member $\text{'}$A$\text{'}$ B$.$ Member C D makes an angle of $30$ degrees with the horizontal, and D is below and to the right of C$.$

Part A

Determine the velocity of block B

at the instant shown. Assume the upward direction as positive.

Express your answer in feet per second to three significant figures.

Activate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

vB

$=$

nothing

ft$/$s

Request Answer

Part B

Determine the velocity of block C

at the instant shown. Assume the upward direction as positive.

Express your answer in feet per second to three significant figures.

Activate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

vC

$=$

nothing

ft$/$s