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Re: [Phys-l] Inertia?



I suspect that the ramp has a bit of upward slope??


On Nov 10, 2008, at Nov 10(Mon) 8:24 , Michael Porter wrote:

On 10-Nov-08, at 7:57 PM, Bernard Cleyet wrote:
This clip (below) was posted (on another list). I find it misleading
-- am I incorrect?

My take on it is that most demonstrations of Newton's First Law are
actually better described as demonstrations of impulse, where delta_t
is very small, or F is small (as is the case in this video, rolling
friction is small). I'm thinking of the "whipping the tablecloth off
the table" trick, where there is actually a force applied to the
dinnerware, but the time is short so nothing gets moving too fast.

Mike

but is it not the objects inertia that KEEPS it from gaining 'much' motion??