- #1

yamugushi

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**[solved] Can someone please check this modified pendulum velocity problem**

## Homework Statement

I'm looking for the ballistic pendulum velocity for a simple machine (pull back lever, it shoots a marble into a block that raises to a certain degree measured)

I have the angle that the block is raised

length of the string

mass of block

## Homework Equations

Ke=Pe (1/2MV^2=MGH)

cos@=length of sting - height/length of string

## The Attempt at a Solution

.20cos25.3 = .20 - h

which gives me .02cm, which in turn gives me .6m/s, which seems a bit slow, I feel as if I'm messing up my trig but I don't know where...

I figured out I was using an incorrect derivation, I was just so fixed on thinking I had messed up my trig work

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