Physics, 19.12.2021 20:30 YeshaKira

A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. Its speed is 38 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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