Many shoppers use an inclined plane to get to the second level in a mall. According to the passage, this would mean that they are most likely traveling by ____.
Simple machines are devices that make our lives easier. They increase the magnitude or change the direction of a force. Using simple machines makes it easier to do many kinds of work. For example, when trying to get a refrigerator onto the back of a truck, a worker will use a ramp or inclined plane. Instead of lifting something heavy a short distance, we can more easily push it over a longer distance but to the same height. The term inclined plane can be used to describe an escalator, staircase, or slide.