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ksaimouli
 3 years 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
ksaimouli
 3 years 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

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ksaimouli
 3 years ago
Best ResponseYou've already chosen the best response.0when i did \[\omega=\frac{ \theta }{ t }\]

Shane_B
 3 years ago
Best ResponseYou've already chosen the best response.1This 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.

ksaimouli
 3 years ago
Best ResponseYou've already chosen the best response.0Can u show me in physics way

VincentLyon.Fr
 3 years ago
Best 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.

ksaimouli
 3 years ago
Best ResponseYou've already chosen the best response.0but @VincentLyon.Fr i did not get the answer with this equation

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.1Show us you numbers.

ksaimouli
 3 years ago
Best ResponseYou've already chosen the best response.0\[\theta=10\pi(2400)\]

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.1What the question asks is the DISTANCE travelled, not the angle swept during that time.

ksaimouli
 3 years ago
Best ResponseYou've already chosen the best response.0Distance in rotation is nothing but the angle right?

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.1No, distance is distance (in metres), and angle is angle (in radians).

ksaimouli
 3 years ago
Best ResponseYou've already chosen the best response.0so i found theta so can i use s=r theta

VincentLyon.Fr
 3 years ago
Best ResponseYou've already chosen the best response.1Yep and you should find about 4.5 km
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