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A small ball (mass 0.1 kg) rolls around on the inside of a funnel (cone), in...

A small ball (mass 0.1 kg) rolls around on the inside of a funnel (cone), in a horizontal circle of radius R = 0.1 m. The ball experiences negligible rolling friction and is traveling at constant speed v. If the inside surface of the funnel makes an angle of 45° to the horizontal (or vertical), and you assume g = 10 m/s2, what is the speed v of the ball? (Hint: think of the role of the normal force by the funnel on the ball.)

This link ( https://d2vlcm61l7u1fs.cloudfront.net/media%2F323%2F3230436e-fb79-457b-83ce-574728ac79b9%2FphpIQN8Ce.png ) provides the diagram of the situation described in the problem.

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