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(4) Wire on a spring. A horizontal conductor of length L = 2.0 m and mass m = 0.12 kg hangs from a vertical spring (connected to its midpoint) and carries a current I = 2.0 A running from left to right. There is a uniform B = 0.2 T field going into the page. (Don't worry how the current is fed to the rod, some massless wires are connected to its ends somewhere.) What is the force constant k if the spring is observed to be stretched from equilibrium by ?x = 1.2 cm when the field is on? First use symbols to derive a formula for k before putting in the numbers.

          (4) Wire on a spring. A horizontal conductor of length L = 2.0 m and mass m = 0.12 kg hangs from a vertical spring (connected to its midpoint) and carries a current I = 2.0 A running from left to right. There is a uniform B = 0.2 T field going into the page. (Don't worry how the current is fed to the rod, some massless wires are connected to its ends somewhere.) What is the force constant k if the spring is observed to be stretched from equilibrium by ?x = 1.2 cm when the field is on? First use symbols to derive a formula for k before putting in the numbers.

(4) Wire on a spring. A horizontal conductor of length L = 2.0 m and mass m = 0.12 kg hangs from a vertical spring (connected to its midpoint) and carries a current I = 2.0 A running from left to right. There is a uniform B = 0.2 T field going into the page. (Don't worry how the current is fed to the rod, some massless wires are connected to its ends somewhere.) What is the force constant k if the spring is observed to be stretched from equilibrium by ?x = 1.2 cm when the field is on? First use symbols to derive a formula for k before putting in the numbers.

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