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mattwild

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**AP Physics HW Help -- Motion of 2 Pendulums**

## Homework Statement

A system consists of two metal balls hanging by strings of length L fixed at a common point as shown. Pendulum A has a mass of 2kg and Pendulum B has a period of 2.0s.

a. What is the length L of each pendulum?

b. What is the maximum speed Pendulum A reaches after being released from a height of 0.6m above its equilibrium position (neglect friction)

c. Pendulums A and B are released at the same time from the same height, colliding right in the middle of their arcs. If Pendulum A comes to a complete stop after the collision while Pendulum B moves backward with half of its original speed, what is the mass of Pendulum B>

## Homework Equations

Period equations

Kinetic Energy Maybe?

Conservation of momentum

## The Attempt at a Solution

For a. I used to formula Tp=2Pi(sqrrt of L/g)

For b. I have no clue maybe use something with KE and PE

For c. Conservation of momentum formula I am thinking?HERE IS THE DIAGRAM:

http://imgur.com/GK1ZvFf

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