Part A

At the instant $=60,$ the boy's center of mass $G$ is

momentarily at rest. $($Figure $1)$ The boy has a weight of $50$ lb $.$

Neglect his size and the mass of the seat and cords.

Figure

$1$ of $1$

Determine his speed when $=85.$

Express your answer to three significant figures and include the appropriate units.

View Available Hint$($s$)$

$v=$

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Part B

Determine the tension in each of the two supporting cords of the swing when $=85.$

Express your answer to three significant figures and include the appropriate units.

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$T=$

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