Question

The linear velocity of a point on the rim of a rotating disc is 3 times greater than that at a point on the disc 8cm from the rim. what is the diameter of the disc?​

Answer 1

Answer:

The diameter of the disc is 48 cm

Explanation:

As we know that linear velocity of any point on the disc is given as

$v = r\omega$

so we will have

$r = 8 cm$

the speed at 8 cm distance is 1/3 times the speed of a point on the rim of the disc

so we have

$R\omega = 3(8cm)\omega$

$R = 24 cm$

So diameter of the disc is 48 cm

#Learn

Topic : circular motion

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