1. The problem statement, all variables and given/known data How deep is the well remember its takes him 3.8 seconds to hear the stone hit the bottom not 3.8 to see it hit the bottom. u=0ms^-1 a=10ms^-2 2. Relevant equations Not 100% sure what equations to use becuase my teacher goes to quickly 3. The attempt at a solution Would you be able to show me the equations to use to solve it. Thanks Nick.