Constant Angular Acceleration: An old 78 rpm record rotates through an angle of 320° as it slows down uniformly from 78.0 rpm to 22.8 rpm. What is the magnitude of the angular acceleration of the record?

A. 2.34 rad/s2
B. 5.46 rad/s2
C. 6.50 rad/s2
D. 8.35 rad/s2
E. 10.9 rad/s2


Answer: B

Physics & Space Science

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A wave travels at 175 m/s along the x-axis. If the period of the periodic vibrations of the wave is 3.00 milliseconds, then what is the wavelength of the wave?

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The rigid body shown is rotated about an axis perpendicular to the paper and through the point P. If M = 0.40 kg, a = 30 cm, and b = 50 cm, how much work is required to take the body from rest to an angular speed of 5.0 rad/s? Neglect the mass of the connecting rods and treat the masses as particles.

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Physics & Space Science