(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a ball moves at 5000 rpm (revolutions per minute). Their radius is 4 cm.

(i)Determine the angular speed in radians per second.

(ii) Find the period of rotation

(iii) Find the linear speed of a point on the outer ball

(iv) Find the linear acceleration of a point on the outer edge of the ball.

2. Relevant equations

angular speed = 2∏ / T

3. The attempt at a solution

(i)

r = 4cm = 0.04m

circumference = 2∏r = 0.08∏

1 rev = 2∏°

5000 rev/min = 5000 X 2∏° / min

10,000∏° / min

10,000∏° / min = 10,000∏° per 60 secs

10,000∏° / 60 = 166.67∏°/sec

angular speed = 166.67∏°/sec

is this correct for part (i)

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# Homework Help: Angular speed and linear speed

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