Question

A pendulum clock keeping correct time is taken to high altitudes,
(a) it will keep correct time
(b) its length should be increased to keep correct time
(c) its length should be decreased to keep correct time
(d) it cannot keep correct time even if the length is changed

Answer 1

Answer:

it cannot keep correct time even if the length is changed.

Explanation:

Hope this answer will help you.

Answer 2

The length of the pendulum should be decreased to keep correct time if a pendulum clock keeping correct time is taken to high altitudes.

Explanation:

• This is because, at higher altitudes, the time period of the simple pendulum increases as it is inversely proportional to square root of acceleration due to gravity.  
• So, higher the altitude, lesser is the acceleration and greater is the time period.  
• In order to reduce this increase in the time period, the length of the pendulum has to be decreased as it is directly proportional to square root of length of the pendulum.