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**[SOLVED] Ballistic pendelum problem**

## Homework Statement

16 g rifle bullet traveling 180 m/s buries itself in a 4.0 kg pendulum hanging on a 3.5 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's maximum displacement

## Homework Equations

arc length s= rtheta

## The Attempt at a Solution

i dont think the block and bullet make a angle with a vertical

so work= F*s where S= Rtheta, but i cant find theta,