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Mon 26 Mar, 2012 09:19 am
A ball is dropped from rest from the top of a 6.15-m-tall building, falls straight downward, collides in-elastically with the ground, and bounces back. The ball loses 22.0% of its kinetic energy every time it collides with the ground. How many bounces can the ball make and still reach a windowsill that is 2.32 m above the ground?
@darklyovert,
3. The ball will bounce 3 times (4 if I am moving slowly or on a phone call when it begins).
After that I am annoyed by the bouncing and the noise it makes upon hitting the ground and take the ball and deflate it, then put it in the fire pit or the shredder so it never bounces again.
@Sturgis,
Yeah I just got the answer on Yahoo. Thanks.
@Sturgis,
Sturgis: Stop yelling for those kids to get off your garage roof. They just want to bounce a ball a few times.
oh, and you do have phone call
Joe( It's about that open fire pit)Nation
@darklyovert,
darklyovert wrote:
Yeah I just got the answer on Yahoo. Thanks.
It would be really good if you could calculate the answer yourself, since that's probably the underlying point of the question.
Unless the class you're taking is on "How to use Google to find answers", then you're doing fine.
@Joe Nation,
You reported my fire pit? Was it on the Bloomberg hit list?
St(I still have my shredder)urgis
@rosborne979,
I actually knew the answer before I asked. I think they have a name for that type of question; do you remember what it is called?
@darklyovert,
validation. maybe? i dont know. testing a hypothesis...
@darklyovert,
darklyovert wrote:
I actually knew the answer before I asked. I think they have a name for that type of question; do you remember what it is called?
An unnecessary question as it would make a pointless rhetorical question....
@darklyovert,
Or
how about the "Hey, I think I've figured this out but would like to make sure." question.
For those we give out attaboys.
Joe(one OhShit is worth TenThousand Attaboys)Nation
And what WAS the answer anyway.
Joe(two?)Nation
@Joe Nation,
Not sure what you mean, but to what I want to think you mean I will say: yes, also true.
@darklyovert,
Actually, it is three complete bounces and the fourth doesn't quite reach the window.
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