A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is...
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 530 rad/s^2 for 12s, then coasts at a steady angular velocity for another 12s.
What is the speed of the dot at t = 1.0 s?
Express your answer to two significant figures and include the appropriate units.
Through how many revolutions has it turned?
Express your answer using two significant figures.
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A computer hard disk 8.0 cm in diameter is initially at rest. A
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A computer disk drive is turned on starting from rest and has constant angular acceleration. - If it took 0.830 s for the drive to make its second complete revolution, how long did it take to make the first complete revolution? - What is its angular acceleration, in rad/s2? A uniform, solid disk with mass m and radius R is pivoted about a horizontal axis through its center. A small object of the same mass m is glued to the...
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A disk-shaped machine part has a diameter of 37.0 cm. Its angular position is given by 0 = -1.37€ + 1.80t2, where t is in seconds and O is in radians. (a) What is the maximum angular speed of the part during this time interval? (Assume the time interval is from t= 0 to when the part reverses its direction.) rad/s (b) What is the maximum tangential speed of a point halfway to the rim of the part during this...
3. A disk 6.0cm in diameter and moment of inertia of 0.015kg-m’ initially at rest at t = 0, is spun up to 720-rpm over 6.0s about an axis through its center of mass. Assume the angular acceleration is constant. a) Find the angular velocity (rad/s) at 6.0s b) Find the angular acceleration (rad/s) c) Find the number of revolutions the disk spins through during that interval. d) What is the mass of the disk? e) What is the change...
A technician is testing a computer-controlled, variable-speed
motor. She attaches a thin disk to the motor shaft, with the shaft
at the center of the disk. The disk starts from rest, and sensors
attached to the motor shaft measure the angular acceleration
?z of the shaft as a function of time. The
results from one test run are shown in (Figure 1) .
a) Through how many revolutions
has the disk turned in the first 5.0 s?
b)What is the...
Problem 17.64 Acord is wrapped around the outer surface of the 75 kg disk. A force of F-(46) N, where is in radians, is applied to the cord The disk has an initial angular velocity of = 1 rad/s. Figure 1) Part A Determine the disk's angular acceleration when it has turned 5 revolutions Express your answer using three significant figures. Enter positive value of the angular acceleration is counterclock acceleration is clockwise Figure < 1 of 1 ) A...
A disk-shaped machine part has a diameter of 37.0 cm. Its angular position is given by 0 = -1.37€ + 1.80t2, where t is in seconds and O is in radians. (a) What is the maximum angular speed of the part during this time interval? (Assume the time interval is from t= 0 to when the part reverses its direction.) rad/s (b) What is the maximum tangential speed of a point halfway to the rim of the part during this...
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