Hi I'm AllAmericanGirl2004,(adsbygoogle = window.adsbygoogle || []).push({});

I need some serious help in my AP Physics class. This last unit, on forces is nearly killing me. Maybe you guys can help me understand this. Here's a problem I'm stuck on...

Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1600 N, what is the max speed he can tolerate at the lowest point of his swing? His mass is 80kg and the vine is 6.8 m long.

Now, it seems to me that the net force is 1600 N and since Tarzan's mass is 80kg, wouldn't you just say that using the F=ma equation that 1600=80a? But that seems way too easy....I don't know. HELP!!!

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: I need some serious help

**Physics Forums | Science Articles, Homework Help, Discussion**