Change in Potential Energy = mgh = (9.0kg)(9.8m/s^2)(1.3m) = 116.4 Joules

[tigerwoods99]

Swinging Monkey!

Homework Statement

A 9.0 kg monkey swings from one branch to another 1.3 m higher. What is the change in potential energy?

Homework Equations

Ke = (1/2)mv^2
GPE = mgh
EPE = (1.2)Kx^2

The Attempt at a Solution

 

[tiny-tim]

Hi tigerwoods99!

(try using the X² tag just above the Reply box )

Ke = (1/2)mv^2
GPE = mgh
EPE = (1.2)Kx^2

ok … which of those equations is it?

 

[Phyisab****]

Take a guess. Here's a hint: you only need one formula, and it involves the thing you're trying to find.

 

[tigerwoods99]

I am going to take a guess and say its the Gravitational Potential because if the object is higher the potential is greater.

So would it be final - initial potential

(8*9.8)(1.3) - (8*9.8)(0) = 101.92?

 

[Phyisab****]

I'm not going to check your calculator work but you used 8m not 9m not sure which want the problem actually says . Other than that looks good.

 

[tigerwoods99]

Thanks guys! I really appreciate it.

Maybe you could look at my other question:
https://www.physicsforums.com/showthread.php?t=373221