A ball rolling down a slope

  • Thread starter GreenTea09
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  • #1
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Main Question or Discussion Point

neglecting friction from the slope and air resistance,
what are the possible forces acting on the ball?

i can only think of 2:
gravitational force by the earth on the ball.
normal force exerted by the slope on the ball.

are there any other forces else that i missed out?
 

Answers and Replies

  • #2
Doc Al
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Sounds like that's about it.

Of course, if the ball is rolling down the slope, there is usually friction involved. (Else it would just slide.)
 
Last edited:
  • #3
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neglecting friction from the slope and air resistance,
what are the possible forces acting on the ball?

i can only think of 2:
gravitational force by the earth on the ball.
normal force exerted by the slope on the ball.

are there any other forces else that i missed out?
In ideal conditions you are correct.

Real world: Energy transfer/inefficiencies would include mechanical to heat, sound, if hitting some rocks (sparks) light... if it's a metal ball passing over any magnets in the ground, electric.
 

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