Question

a pendulum is suspended from the ceiling of a lift the lift is being accelerated upwards and downwards how is time period is affected in each case​

Answer 1

Answer:

Given:

A pendulum is used in a lift in 2 cases:

• Accelerated upwards
• Accelerated downwards.

To find:

Time period in each case

Concept:

In normal conditions , Time period is given as :

$time \: period = 2\pi \sqrt{ \frac{l}{g} }$

Calculation:

We need to calculate the net acceleration in each case :

Case 1 : When accelerated upwards :

Net acceleration = (g + a)

$time \: period = 2\pi \sqrt{ \frac{l}{(g + a)} }$

Case 2: When accelerated downwards:

Net Acceleration = (g - a)

$time \: period = 2\pi \sqrt{ \frac{l}{(g - a)} }$