In the figure below, a disk (radius R = 1.0 m, mass = 2.0 kg) is suspended from a pivot a distance d = 0.25 m above its center of mass. For a circular disk,
. The angular frequency (in rad/s) for small oscillations is approximately
?
a.
4.2.
b.
2.1.
c.
1.5.
d.
1.0.
e.
3.8.
b
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The kinetic friction force that a horizontal surface exerts on a 60.0-kg object is 50.0 N. If the initial speed of the object is 25.0 m/s, what distance will it slide before coming to a stop?
A) 15.0 m B) 30.0 m C) 375 m D) 750 m
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An image is 4.0 mm in front of a converging lens with focal length of magnitude 5.0 mm. Where is the object for this image?
A) 2.2 mm in front of the lens B) 9.0 mm behind the lens C) 2.2 mm behind the lens D) 20 mm in front of the lens