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

Question

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

Quizplus · Accepted Answer

The Answer of 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

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

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