- #1

lanzjohn

- 14

- 0

## Homework Statement

The string in the Figure is L = 102.0 cm long and the distance d to the fixed peg P is 73.4 cm. When the ball is released from rest in the position shown, it will swing along the dashed arc.How fast will it be going when it reaches the highest point in its swing?

## Homework Equations

PE: mg(2r)

KE: (1/2)*mv^2

mg(2r)+(1/2)*mv^2= C (Total E)

## The Attempt at a Solution

Having troubles. The M's do not cancel out in this one soo I am all flustered. Is it just alegbra now? But my question is what is C? How can the M's cancel out so that I can begin to compute V. I mean I found the velocity at the lowest point of the arc which was 4.47124 m/s. So I guess with knowing velocity I can figure out mass but when I tried that I was still a little confused.

Thanks for your help.