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a compact disc has a radius of 6cm if the disc rotates about its central axis at a constant angular speed of 5 rev/s what is the total distance traveled by a point on the rim of the disc 40min
 one year ago
 one year ago
a compact disc has a radius of 6cm if the disc rotates about its central axis at a constant angular speed of 5 rev/s what is the total distance traveled by a point on the rim of the disc 40min
 one year ago
 one year ago

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ksaimouliBest ResponseYou've already chosen the best response.0
when i did \[\omega=\frac{ \theta }{ t }\]
 one year ago

ksaimouliBest ResponseYou've already chosen the best response.0
but why? (ur answer)
 one year ago

Shane_BBest ResponseYou've already chosen the best response.1
This question doesn't even require physics...it's purely mathematical: First, calculate the circumference of the circle. Then multiply that by 5 since it makes 5 revolutions per second. That will give you how far the dot traveled in 1 second. Then just multiply that times how many seconds are in 40 minutes.
 one year ago

ksaimouliBest ResponseYou've already chosen the best response.0
Can u show me in physics way
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.1
\(\omega=\frac{ \theta }{ t }\) is ok. You should just be careful to plug in the values in the right units.
 one year ago

ksaimouliBest ResponseYou've already chosen the best response.0
but @VincentLyon.Fr i did not get the answer with this equation
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.1
Show us you numbers.
 one year ago

ksaimouliBest ResponseYou've already chosen the best response.0
\[\theta=10\pi(2400)\]
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.1
What the question asks is the DISTANCE travelled, not the angle swept during that time.
 one year ago

ksaimouliBest ResponseYou've already chosen the best response.0
Distance in rotation is nothing but the angle right?
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.1
No, distance is distance (in metres), and angle is angle (in radians).
 one year ago

ksaimouliBest ResponseYou've already chosen the best response.0
so i found theta so can i use s=r theta
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.1
Yep and you should find about 4.5 km
 one year ago
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