A solid sphere and a solid cylinder, both uniform and of the same mass and radius, roll without slipping at the same forward speed. It is correct to say that the total kinetic energy of the solid sphere is
A) more than the total kinetic energy of the cylinder.
B) less than the total kinetic energy of the cylinder.
C) equal to the total kinetic energy of the cylinder.
B
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The area under the force vs. displacement curve represents:
a. area. b. force. c. work. d. coefficient of static friction.
When a wool blanket is used to keep warm, what is the primary insulating material?
a. wool b. air c. the trim around the edge of the blanket d. a thin layer of aluminum foil (usually not apparent) inside the blanket
A car that is initially moving at 7.50 m/s begins to accelerate forward uniformly at 0.550 m/s2
(a) How long after beginning to accelerate does it take the car to move 3.50 km? (b) How fast is the car moving just as it has traveled 3.50 km? What will be an ideal response?
Electrical resistance is normally measured in
A) amperes. B) volts. C) newtons. D) joules. E) none of the above