17. A puzzle like that in Figure 26.18 was given to Albert Einstein on his 76th...

Question:

17. A puzzle like that in ▼ Figure 26.18 was given to Albert Einstein on his 76th birthday by Eric M.

Rogers, a physics professor at Princeton University.

The goal is to get the ball into the cup without touching the ball. (Jiggling the pole up and down will not do it.) Einstein solved the puzzle immediately and then confirmed his answer with an experiment.

How did Einstein get the ball into the cup? [Hint:

He used a fundamental concept of general relativity.

(This problem is adapted from R. T. Weidner, Physics.

Boston: Allyn & Bacon, 1985)].

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DANISH NAYYAR

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