The sedimentary rock known as ______________ consists of deposits of calcium carbonate (calcite)
a. coal
b. sandstone
c. limestone
d. lodestone
c
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Rotational Dynamics: A mechanic is examining the wheel of a bicycle to adjust the brake. With the bicycle off the ground, he manually rotates the wheel until it reaches an angular speed of 12.0 rad/s and then allows it to coast to a stop. If the wheel has a moment of inertia of 0.100 kg ? m2, and the wheel slows uniformly to a stop in 160 s, what is the magnitude of the retarding torque?
A. 1.00 N ? m B. 0.00750 N ? m C. 0.0787 N ? m D. 1.33 N ? m E. 1.67 N ? m
Two blocks in contact with each other are pushed to the right across a rough horizontal surface by the two forces shown. If the coefficient of kinetic friction between each of the blocks and the surface is 0.30, determine the magnitude of the force exerted on the 2.0-kg block by the 3.0-kg block.
A. 15 N B. 25 N C. 11 N D. 22 N E. 33 N
Series/Parallel Circuits: In the circuit shown in the figure, the resistor R has a variable resistance. As R is decreased, what happens to the currents?
A. I1 remains unchanged and I2 increases. B. I1 decreases and I2 decreases. C. I1 decreases and I2 increases. D. I1 increases and I2 decreases. E. I1 increases and I2 increases.
One joule per coulomb is a unit of
A) energy. B) power. C) voltage. D) current. E) resistance.