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Physics 15 Online
OpenStudy (micheletheresam):

A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.0 m long. The bowler hears the sound of the ball hitting the pins 2.80 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s. Answer to the nearest 0.001 m/s.

OpenStudy (micheletheresam):

I will buy whoever gives me the right answer a Taco Bell gift card ugh

OpenStudy (happytalesrebornn):

LOL!

OpenStudy (happytalesrebornn):

Are you familiar with velocity as a vector?

OpenStudy (micheletheresam):

Not exactly... And I take so many notes I don't understand why this is so hard for me

OpenStudy (happytalesrebornn):

I presume you haven't familiarized yourself with general Calculus then. Hypothetically, 2 dimensional variables create a derivative, which can be presumed velocity . For example: |dw:1410725454682:dw|

OpenStudy (micheletheresam):

I never took calc this was supposed to be physics without calc :(

OpenStudy (happytalesrebornn):

Derivative*. Typos. With this already known, we can say that Velocity=Displacement*Time. This is just an example, I don't believe General Physics requires any formal calc. Should be all Classical mech... and some basic Quantum.

OpenStudy (happytalesrebornn):

Sorry displacement/Time. V=d/t

OpenStudy (micheletheresam):

So would the displacement be 16?

OpenStudy (happytalesrebornn):

Now, assuming that you're bowling from 16.0m. away, sound shouldn't dilate too much. And yes.

OpenStudy (micheletheresam):

And is time 2.7529 once you take out the travel of the sound from the time?

OpenStudy (happytalesrebornn):

mhmmm

OpenStudy (micheletheresam):

So it's v=16/2.7529

OpenStudy (micheletheresam):

V=3.097?

OpenStudy (happytalesrebornn):

Ehhhhh

OpenStudy (anonymous):

v=5.812m/s

OpenStudy (micheletheresam):

What'd i do wrong?

OpenStudy (anonymous):

Now where's my gift card : )

OpenStudy (micheletheresam):

Omg it's right

OpenStudy (happytalesrebornn):

Just inaccurate rounding.

OpenStudy (micheletheresam):

Thank you guys so much

OpenStudy (happytalesrebornn):

Does matter I suppose, it's close enough. Typically in physics, all calculations must be finite. Esp. in astrophysics. Np, good luck with your course.

OpenStudy (happytalesrebornn):

Doesn't *

OpenStudy (micheletheresam):

Thanks I think I'll need it

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