Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Examples of machines that increase the distance over which force is applied are paddles and hammers. Figure below explains how these machines work. In each case, the machine increases the distance over which the force is applied, but it reduces the strength of the applied force. Answer: strength
Paddles and hammers are examples of simple machines that increase the distance over which force is applied, while reducing what?