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AP Physics HW Help - Motion of 2 Pendulums

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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 im thinking?


HERE IS THE DIAGRAM:

http://imgur.com/GK1ZvFf
 
Last edited:

Answers and Replies

  • #2
6,054
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You have all the right ideas - just use them.
 

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