The diagram below shows a ladder sliding down a wall. The point D is at the midpoint of the ladder. The instantaneous velocity at A is 4 m/s. What is the instantaneous speed at D? 1.5 m/s 0 m/s 4 m/s 3 m/s 2.5 m/s

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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 –