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Trashcann

Math problem

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I have unit with current speed, acceleration, distance and mass. I want to stop it directly above destination point. Question is: From what distance should it start slowing down (decrease in acceleration till it reaches deceleration ) to stop to destionation point? (ie. When should it turn off its engine (on what distance before dest) so it will glide by the inertion till it''s stopped by friction?)

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This sounds suspiciously like a homework problem, aside from the usual "go to a homework help board," look up the kinematics equations. (I just did them in physics, they''re quite easy.)

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homework problem? not in pre algebra...
just trying to get an answer for this guy:
http://www.truevision3d.com/html/modules.php?op=modload&name=phpBB2&file=viewtopic&t=4408

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what''s the friction force, which hopefuly, is constant? Otherwise, it will never slow down.

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from here

x = v2 / 2.a

a = friction_force / mass

so

x = v2 / (2 * friction_force / mass)

x is the distance.

I think this is correct...

[edited by - oliii on January 5, 2004 8:30:13 PM]

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