A bucket filled with water has a mass of 23 kg and is attached to a rope, which in turn, is wound around a 0.080-m radius cylinder at the top of a well. What torque does the weight of water and bucket produce on the cylinder if the cylinder is not permitted to rotate? (g = 9.8 m/s2)
a. 34 N•m
c. 11 N•m
b. 18 N•m
d. 36 N•m
B
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a. brown dwarfs. b. quasars. c. red supergiants. d. globular clusters.
The moons of Uranus have been named after ____
a. Roman gods b. Greek goddesses c. characters of Shakespearean plays d. characters of Tennessee Williams' plays e. the Romanoff family children's names
Two masses collide and stick together. Before the collision one of the masses was at rest. Is there a situation in which the kinetic energy is conserved in such a collision?
a. Yes, if the less massive particle is the one initially at rest. b. Yes, if the more massive particle is the one initially at rest. c. Yes, if the two particles have the same mass. d. No, kinetic energy is always lost is such a collision.
A hydraulic press multiplies a force by 100, which is done at the expense of
A) energy, which is divided by 100. B) the distance through which the force acts. C) the time through which the force acts. D) the mechanism providing the force. E) none of the above