A pendulum-driven grandfather clock often has a small mass that can be slid up and down the pendulum arm to adjust the swing period in case the clock runs to0 fast or too slow. If one particular clock is losing one second every week, what should be done, and why? (a) Move the mass up, because the lower rotational inertia will make the clock run faster. (b) Move the mass up, because the higher rotational inertia will make the clock run slower. (c) Move the mass down, because the lower rotational inertia will make the clock run faster. (d) Move the mass down, because the higher rotational inertia will make the clock run slower. 3.

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.