How Does Vine Tension Affect Jill's Swing Dynamics?

[MaggieNF]

Homework Statement

Jill of the jungle swings on a vine 6.9 m long (assume no friction)

what is the tension in the vine if jill, whose mass is 65 kg, is moving at 2.4m/s when the vine is vertical? Draw a free body diagram

Assume Jill stops holding on at exactly the moment the vine is vertical and lands on the ground exactly 2.5 seconds later. What is her vertical speed when reaching the ground?

How does the tension in the vine change if her mass is doubled? How does this effect her velocity when reaching the ground? explain

Homework Equations

The Attempt at a Solution

was thinking you could use T=ma.. thus 65* 2.4 =154 N

 

[tiny-tim]

Welcome to PF!

Hi MaggieNF! Welcome to PF!

what is the tension in the vine if jill, whose mass is 65 kg, is moving at 2.4m/s when the vine is vertical? Draw a free body diagram
…
I was thinking you could use T=ma.. thus 65* 2.4 =154 N

but 2.4 is v, not a

you need to find the https://www.physicsforums.com/library.php?do=view_item&itemid=27"