A Stone Is Released from Rest at a Height H $\sqrt { 2 }$

question 12

Multiple Choice

A stone is released from rest at a height h at the left side of a loop-the-loop,as shown in the figure.There is no appreciable friction force exerted by the track or by air resistance.If the radius of the loop is R,what is the minimum height h for which the stone will not fall off the track at the top of the loop?

• A)3.5 R
• B)2.5 R
• C)2.0 R
• D) \(\sqrt { 2 }\) R
• E)3.0 R

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