Grandfather clocks are designed so they can be adjusted by moving the weight at the bottom of the pendulum up or down.Suppose you have a grandfather clock at home that runs fast.Which of the following adjustments of the weight would make it more accurate? (There could be more than one correct choice. )
A)Raise the weight.
B)Lower the weight.
C)Add more mass to the weight.
D)Remove some mass from the weight.
E)Decrease the amplitude of swing by a small amount.

Question

Quizplus · Accepted Answer

The time it takes for the pendulum to swing back and forth is determined by the length of the pendulum. By lowering the weight, the effective length of the pendulum is increased, making the clock run more slowly and therefore more accurate. Raising the weight would do the opposite and make the clock run even faster. Adding or removing mass from the weight would have no effect on the clock's accuracy. Decreasing the amplitude of the swing would also have little effect on accuracy, as long as the swing is still wide enough for the escapement mechanism to function properly.

Grandfather Clocks Are Designed So They Can Be Adjusted by Moving