A circuit is pulled with a 16-N force toward the right to maintain a constant speed v. At the instant shown, the loop is partially in and partially out of a uniform magnetic ield that is directed into the paper. As the circuit moves, a 6.0-A current flows rough a 4.0-W resistor. The speed v is given by

A circuit is pulled with a 16-N force toward the right to maintain a constant speed v. At the instant shown, the loop is partially in and partially out of a uniform magnetic ield that is directed into the paper. As the circuit moves, a 6.0-A current flows rough a 4.0-W resistor. The speed v is given by