To create a longitudinal wave in a stretched spring, you would need to apply a force at one end of the spring so that it compresses and then release it so that it expands. This compression and expansion will propagate as a longitudinal wave through the spring.
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To set up a longitudinal wave in a stretched spring, you would need to displace one end of the spring from its equilibrium position, creating a compression or rarefaction. This disturbance would propagate longitudinally through the spring as adjacent particles push or pull on each other. The wave would continue to travel along the spring until it reaches the other end.
Compression.
To create a longitudinal wave in a metal rod, you would need to strike the rod at one end with a quick and abrupt force. This force will generate compressions and rarefactions in the material, causing the longitudinal wave to propagate through the rod.
A spring is a common component in force meters that returns to its original shape after being stretched. When a force is applied to the spring, it deforms but returns to its original position once the force is removed. This property makes springs ideal for measuring forces due to their consistent elasticity.
Elastic energy, for example, a stretched spring.