# Does the time period of a pendulum change if raised by about 1 km?Does the time period of a pendulum change during free fall?

### Asked by joykphukan | 28th Feb, 2015, 08:17: PM

Expert Answer:

### If a pendulum is raissed by 1 km, then its time period increases. This is because g decreases with altitude.
Consider a pendulum hanging from the ceiling of a lift. If the lift is in free fall, then the time period will be infinity. This is because the pendulum will not feel any gravity and will be weightless.

### Answered by Romal Bhansali | 3rd Mar, 2015, 10:49: AM

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