Question

How does the period of a pendulum suspended from the ceiling of an airplane change when the plane:

(a) takes off

(b) lands with constant acceleration, and

(c) cruises at high altitude with constant speed.

**Can you type it please and not write.

Answer 1

a) when plane takes off it has constant acceleration in upward direction therefore inside the plane there is pseudo force acting in downward direction increasing the acceleration due to gravity g to g+a

b) applying the above concept here g changes to g-a

c) inthis case the gravity is decreased to g'

We know

Here h is the height of altitude

And R is the radius of earth

Therefore eqn is