Double swing

HOW

• Two people, preferably of similar weight, are needed for this.
• Sit on the swings.
• One person starts to swing, the other sits still with legs raised.
• Then the person swinging also stops swinging, allowing his or her swing to move freely.
• Now observe the movement of the swings. This is the result of the cyclical transfer of energy from the first swing to the second and the other wy around.