MLA Citation: Bloomfield, Louis A. "Question 797"
How Everything Works 21 Jan 2018. 21 Jan 2018 <>.
797. If energy is always conserved, why does a pendulum eventually stop swinging if you leave it alone?
The pendulum experiences friction and air resistance, both of which extract energy from the pendulum. Friction turns that energy into thermal energy and air resistance transfers the energy to the air.

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