Two objects, a ring and a disk, both with equal mass and radii. Each is rotating about an axis through its center, as shown. Which has the greatest rotational inertia, I, a uniform disk or a ring?
A. They have the same I, since they both have the same mass and radius
B. The disk
C. The ring
C. The ring
from the axis of rotation than the solid disk, so it has a greater rotational inertia. The ring has more of its mass distributed further
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If a 5°C piece of iron is heated until it has twice as much internal energy, its temperature will be
A) 10°C. B) 273°C. C) 278°C. D) 283°C. E) 556°C.
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A uniform solid sphere of mass 1.5 kg and diameter 30.0 cm starts from rest and rolls without slipping down a 35° incline that is 7.0 m long
(a) Calculate the linear speed of the center of the sphere when it reaches the bottom of the incline. (b) Determine the angular speed of the sphere about its center at the bottom of the incline. (c) Through what angle (in radians) does this sphere turn as it rolls down the incline? (d) Does the linear speed in (a) depend on the radius or mass of the sphere? Does the angular speed in (b) depend on the radius or mass of the sphere?