![]() The second step involves the identification and listing of known information in variable form. The solution to this problem begins by the construction of an informative diagram of the physical situation. Determine the time required for the shingles to reach the ground. Luke Autbeloe drops a pile of roof shingles from the top of a roof located 8.52 meters above the ground. In each example, the problem solving strategy that was introduced earlier in this lesson will be utilized. The two examples below illustrate application of free fall principles to kinematic problem-solving. These four principles and the four kinematic equations can be combined to solve problems involving the motion of free falling objects. ![]() That is, a ball projected vertically with an upward velocity of +30 m/s will have a downward velocity of -30 m/s when it returns to the same height.
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