1. A 0.25 kg block of wood is at rest at the bottom of a loop-the-loop section of track when it is struck by a 0.005kg bullet initially moving at speed v. Upon impact the bullet becomes embedded in the wood.

a. How fast was the bullet traveling prior to striking the block if the bullet/block combination just slides through the top of the loop-the-loop without losing contact with the track? Ignore friction. (The radius is 40cm).