15 Jun '07 04:51>
A rubber ball dropped 80 feet rebounds on each bounce 3/5 of the height from which it fell. How far will it ravel before coming to rest?
😀
for all you smart fellers
😀
for all you smart fellers
Originally posted by Drew LIt wont "travel" as it was dropped from height, if it was dropped perfectly vertical, it will rest where it first bounced. (in theory!)
A rubber ball dropped 80 feet rebounds on each bounce 3/5 of the height from which it fell. How far will it ravel before coming to rest?
😀
for all you smart fellers
Originally posted by smomofoyeah, it was on my pre-calculus final.
Cool. I actually figured that out on my own! Thanks.
Originally posted by smomofohahaha, I got that one right and pulled off an 83 on the exam
I couldn't remember that stuff, so I just added the first few terms of (0.6) + (0.6)^2 + (0.6)^3 + ... and saw that it was headed for 1.5 and went from there. Maybe not the way it's supposed to be done, but I bet I could have faked my way to a decent mark on that question.
Originally posted by smomofoThis is a correct approach, you just should show that the series converges.
I couldn't remember that stuff, so I just added the first few terms of (0.6) + (0.6)^2 + (0.6)^3 + ... and saw that it was headed for 1.5 and went from there. Maybe not the way it's supposed to be done, but I bet I could have faked my way to a decent mark on that question.