A grandfather clock is running too fast. To fix it, should the pendulum be lengthened or shortened? Explain.?

Answer 1

Since
T=2pi sqrt(L/g)

The longer the arm L the longer is the period T the slower the clock would run.

So to slow the clock lengthen the arm L.

Answer 2

I got my GF clock off time once & took me a week or so to get it back to correct ticking.
You will need to lengthen the little screw/nut thing on bottom of pendulum and you may to do it one turn at a time and watch the clock by the minute as you time it with another watch/clock that has a second hand. If it isn't at the right lowered turn of the screw, just do it again and time it.

Answer 3

The pendulum should be lengthened. The period of a pendulum increases with its length. Ever notice how a tall swing set swings more gradually than a short one?

Answer 4

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Answer 5

lengthened so that it takes more kinetic energy to build up to move it which will take longer making it run a little slower

Answer 6

Shortned, makes it go slower because pendlum swings less.