2)
The staples inside a stapler are kept in place by a spring with a relaxed length of 0.115 m. If the
spring constant is 51.0 N/m, how much elastic potential energy is stored in the spring when its
length is 0.150 m?

The stored potential energy will be "0.312 J".

According to the question.

Length,

L = 0.115 m

Spring constant,

k = 51.0 N/m

Now,

→

Thus the above answer is correct.

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0.0312J

Explanation:

Let x be the distance the staple moves:

And spring constant is

Hence, the potential energy is 0.0312J

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.