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imy786
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Homework Statement
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.
Homework Equations
angular speed = 2∏ / T
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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