Question
Asked Jan 26, 2020
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The energy of a simple pendulum is 1J when its length is 2m and amplitude of motion is 3cm . Calculate the energy when its amplitude is not changed but length is changed to 1m.

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Expert Answer

Step 1

Given:

Length of string (l1) = 2 m

Energy (E) = 1 J

Amplitude of pendulum (a1) = 3 cm. = 3×10-2 m

Length of modified string (l2) = 1 m

Step 2

Relation between length of string and energy is,

Physics homework question answer, step 2, image 1
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Step 3

The energy of modifi...

Physics homework question answer, step 3, image 1
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