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Normal reaction for particle at rest on a sphere

1 vote

The answer is C.

It is not difficult to understand why force $F$ decreases as the small metal ball is raised to the top of the sphere. The normal reaction $R$ from the hemisphere bears a greater share of the weight of the metal ball.

But why is the normal reaction $R$ the same for all positions of the ball on the sphere? Is there an intuitive explanation?

See discussion in Problem Solving Strategies chatroom on Physics Stack Exchange.

asked Oct 17, 2018 in Physics Problems by sammy gerbil (28,876 points)
edited May 16, 2019 by sammy gerbil
Thanks for sharing it.

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