Two objects of equal mass are fixed to rotate about a common axis that passes through each of their centres of mass. Although their shapes are identical from the outside, one is solid (mass is spread out through its volume e.g. a bowling ball) and the other is hollow (mass is distributed close to its surface, e.g. a tennis ball). Which one do you expect to be the most difficult to rotate from rest and why?

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15-07-2024
Physics

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Two objects of equal mass are fixed to rotate about a common axis that passes through each of their centres of mass. Although their shapes are identical from the outside, one is solid (mass is spread out through its volume e.g. a bowling ball) and the other is hollow (mass is distributed close to its surface, e.g. a tennis ball). Which one do you expect to be the most difficult to rotate from rest and why?

Sagot :

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