a 7 gram bullet collides horizonally with a 43 gram block resting on a frictionless horizontal surface as shown in the accompany diagram.

a 7 gram bullet collides horizonally with a 43 gram block resting on a frictionless horizontal surface as shown in the accompany diagram. The bullet remain embedded in the block and subsequently causes the block to slide down a frictionless slope onto another frictionless horizontal surface. On this lower horizontal surface the block is observed to be moving at a speed of 14m/s. With a hight of 7.5m. Find the original speed of the bullet just before it collided with the block