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Applying oil will only get the ball as high as Point A (on the opp side between B and C).  So B is TRUE

 

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I thought both B and C cannot enable the ball to reach point C. By law of conservation of energy, energy cannot be created. Point C will have a higher PE compared to PE at point A, irregardless of where the bowl is placed at.

Maybe can counter check with Science teacher? 

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That’s right. Ans should be (4).

I was correcting the T/F indication on the paper.

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