Two children are walking at the same steady speed of 2 feet/second at the United terminal at O’Hare airport. One steps on the moving walkway and continues walking, while the other continues along the regular floor. The moving walkway moves in the direction of the child’s motion with speed 4 feet/second. The first child stops at the end of the moving walkway and waits 7 seconds for the second child to catch up. How long is the moving walkway (in feet)?

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Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –