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,

1. The angular frequency (in rad/s) for small oscillations is approximately
?
image

a.
4.2.

b.
2.1.

c.
1.5.

d.
1.0.

e.
3.8.


b

Physics & Space Science

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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

Physics & Space Science

The wheelbase on a 50,000-kg truck is 2.40 m wide and the truck's center of mass is located along the vertical centerline of the truck and 2.00 m above the bottom of the tires

The truck is going around a horizontal turn with a radius of 250 m at 24.0 m/s. What is the total normal force on the tires on the side of the truck that faces the center of the curve? A) 245 kN B) 149 kN C) 349 kN D) 283 kN E) 255 kN

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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

Physics & Space Science