Physics
Physics, 24.03.2020 00:13, willjean7027

A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. Its speed is 36 m/s when it reaches ground level. What was its speed when its height was half that of its starting point?

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A roller coaster starts from rest at its highest point and then descends on its (frictionless) track...

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