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A computer disk is 8.0 cm in diameter. A reference dot on the edge of the disk is initially located at 0 = 45°. The disk accelerates steadily for 0.50 s, reaching 2000 rpm, then coasts at steady angular velocity for another 0.50 s.
a. What is the tangential acceleration of the reference dot at
t = 0.25 s?
b. What is the centripetal acceleration of the reference dot at
t = 0.25 s?
c. What is the angular position of the reference dot at t = 1.0 s?
d. What is the speed of the reference dot at t = 1.0 s?
Sagot :
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