Solid sphere and hollow sphere rolled down an inclined plane

  • #1
20
1
A solid sphere and a hollow one of same mass and radii are rolled down a rough inclined plane.
Which of the following is true?
(A) solid sphere reaches bottom with greater speed.
(B) solid sphere reaches the bottom with greater kinetic energy.

( I know that option A is correct.Thus I felt that B should also be correct.
However A is the only option given in the book as correct. Please help)
 

Answers and Replies

  • #2
stockzahn
Homework Helper
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Why do you think the kinetic energy of the solid sphere is greater? Because of its higher velocity? If this is the case, maybe another look at the statement helps: it says ' [...] are rolled down [...] '.
 
  • #3
JBA
Science Advisor
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See the above but even in that case V at the end = V initial + the acceleration due to gravity that is experienced by both balls; or, is there something else I am also missing?
 
Last edited:
  • #4
Mister T
Science Advisor
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Please use the template so we can help you.
 

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