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How many bounces can the ball make?

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?
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Type: Question • Score: 1 • Views: 2,480 • Replies: 14
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Sturgis

2
Mon 26 Mar, 2012 09:27 am
@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.
darklyovert

1
Mon 26 Mar, 2012 09:33 am
@Sturgis,
Yeah I just got the answer on Yahoo. Thanks.
Joe Nation

2
Mon 26 Mar, 2012 09:36 am
@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
rosborne979

2
Mon 26 Mar, 2012 09:42 am
@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.
Sturgis

1
Mon 26 Mar, 2012 09:44 am
@Joe Nation,
You reported my fire pit? Was it on the Bloomberg hit list?

St(I still have my shredder)urgis
0 Replies

darklyovert

1
Mon 26 Mar, 2012 10:35 am
@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

1
Mon 26 Mar, 2012 10:38 am
@darklyovert,
validation. maybe? i dont know. testing a hypothesis...
0 Replies

tsarstepan

1
Mon 26 Mar, 2012 10:41 am
@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

1
Mon 26 Mar, 2012 10:42 am
@tsarstepan,
true.
Joe Nation

1
Mon 26 Mar, 2012 12:45 pm
@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
Joe Nation

1
Mon 26 Mar, 2012 12:46 pm
And what WAS the answer anyway.

Joe(two?)Nation
darklyovert

1
Mon 26 Mar, 2012 12:47 pm
@Joe Nation,
Not sure what you mean, but to what I want to think you mean I will say: yes, also true.
0 Replies

darklyovert

1
Mon 26 Mar, 2012 12:47 pm
@Joe Nation,
darklyovert

1
Mon 26 Mar, 2012 08:40 pm
@darklyovert,
Actually, it is three complete bounces and the fourth doesn't quite reach the window.
0 Replies

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