## Inclined Plane question

dragonfruit35
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### Inclined Plane question

The rules state that an object can be pushed or pulled up an incline plane to count for points. If a marble rolls up a ramp due to kinetic energy (ie. not being directly pushed or pulled) would this still count?

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Uncle Fester
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### Re: Inclined Plane question

Good question onyour part. Answer is "no." Nothing is pulling/pushing the mass on the ramp.
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SPP SciO
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### Re: Inclined Plane question

Uncle Fester wrote:Good question onyour part. Answer is "no." Nothing is pulling/pushing the mass on the ramp.

"Inclined Planes must be stationary and have an object pushed or pulled at least 10cm up and along the surface of the inclined plane to count for points."

Interesting - So imagine a marble being launched up a ramp. If the initial force comes from a compressed spring (like in a toilet paper dispenser), but it's just an impulse, and the inertia carries the marble up the ramp, that is NOT acceptable for points, because nothing is pulling/pushing (besides gravity & friction) WHILE the marble is on the inclined plane?

But - if that spring were outfitted with some sort of plunger apparatus (at least 10cm) that continually applied force to the same marble to get it up the inclined plane, that's OK?

My interpretation before reading this post was, both scenarios would be OK. But now I've got my doubts. Can anyone confirm/deny?
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