Which of the following tools is considered a striking tool?

A sledge hammer is considered a striking tool due to its design and primary function. Striking tools are specifically engineered to deliver significant force when impacted against an object, making them ideal for tasks such as breaking down doors or demolishing barriers. The heavy head and long handle of a sledge hammer allow the user to generate momentum and apply considerable force with each swing, facilitating efficient and effective impact.

In contrast, the other tools listed serve different functions. A reciprocating saw is a cutting tool that uses a back-and-forth motion of its blade to cut through materials, which does not involve the same kind of striking force. A flat head screwdriver is designed for turning screws and does not have striking capabilities. Lastly, a power saw operates through a rotating blade rather than striking, making it a cutting tool rather than a striking one. This distinction is what fundamentally sets the sledge hammer apart as the correct choice in this context.