As the pendulum swings to the left the string collides with a rod, which shortens the pendulum’s length. This shortens the period of the swing until it swings back to the right. A horizontal bar is placed to show that the mass reaches the same height on both ends of the oscillation. This demonstrates that energy is conserved when the pendulum’s length is varied through out the oscillation, through the period changing.
(3A10.11) Variable Pendulum
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As the pendulum swings to the left the string collides with a rod, which shortens the pendulum’s length. This shortens the period of the swing until it swings back to the right. A horizontal bar is placed to show that the mass reaches the same height on both ends of the oscillation. This demonstrates that energy is conserved when the pendulum’s length is varied through out the oscillation, through the period changing.
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