Inclined plane/gravity question

  • Thread starter artie1
  • Start date
  • #1
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This is my first time posting here. My son is in junior high and asked his science teacher this question but he said the teacher seemed uncertain his response was correct.

If a ball is on an inclined plane and rolls down it, does a greater pull of gravity cause the ball to roll faster, or does the increased friction of the ball on the surface of the inclined plane due to the increased gravity slow the ball down more?

In other words, if the same ball and inclined plane were moved from earth to, say, Saturn or Jupiter, would the ball roll faster on earth or on the planet with greater gravity?

I'm sure it's a simple answer on this forum, I guessed the ball would roll faster on Saturn than earth but I wanted to get the "real" answer here.

Thanks,
Artie
 

Answers and Replies

  • #2
1,255
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Faster.

Additionally, if you're considering an ideal situation (i.e. rolling without slipping), friction doesn't slow the ball down at all, regardless of gravity.
 
  • #3
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Zhermes- Thank you- I appreciate your help!
 

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