A massive, custom-built sensor is dropped over the side of a building. Upon impa

Question

A massive, custom-built sensor is dropped over the side of a building. Upon impact, it transmits its impact speed of 39.1 m/s just before it is very rapidly brought to a stop by its impact with the ground. How tall is the building? (Use 9.8 m/s2 as the value for the acceleration of gravity.) A massive, custom-built sensor is dropped over the side of a building. Upon impact, it transmits its impact speed of 39.1 m/s just before it is very rapidly brought to a stop by its impact with the ground. How tall is the building? (Use 9.8 m/s2 as the value for the acceleration of gravity.)

Explanation / Answer

height of the building is H = v2 / 2g =(39.1)2 / (2*9.8)

                                         = 78 meters

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