Question 8: What type of energy is stored in the spring of a watch?
ANSWER
When we wind the spring of a watch, we do work on it. This work appears as elastic potential energy of the spring.
Mathematically, this work is equal to
.
Where ‘k’ is the spring constant.
Therefore,
Elastic potential energy in the spring =
This potential energy then slowly converts to K-E and we see the needles of the watch moving round the clock.
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