Question: A roller coaster starts from rest at its highest point and then descends on its ( frictionless ) track. Its speed is 3 2 m

A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. Its speed is 32ms when it reaches ground level.
Part A
What was its speed when its height was half that of its starting point?
16ms
27ms
11ms
23ms
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A roller coaster starts from rest at its highest

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