Magnetic forces can be used to accelerate projectiles to very high speeds in a so-called railgun. I the simplified version shown below, a voltage source drives current down two parallel ideal wires a section of metal in contact with both wires. The metal has a resistance 0.6 m2 and weights 6 grams. We assume that the contacts between the wires and the section of metal are friction-les and that the metal can slide along the wires for a total distance of 1 m before exiting the railgun projectile. Our goal is to calculate what voltage that will cause the metal projectile to leave the railgun at the speed of sound (343 m/s), assuming it starts from rest. 15 cm x B = 0.80 T First, what constant force (in N) will accelerate the rod to the speed of sound in 1 m? Give your answer to 3 significant digits. Question 10 Next, which voltage V will generate the necessary current to create this constant force? Give you answer to 3 significant digits.

Magnetic forces can be used to accelerate projectiles to very high speeds in a so-called railgun. I the simplified version shown below, a voltage source drives current down two parallel ideal wires a section of metal in contact with both wires. The metal has a resistance 0.6 m2 and weights 6 grams. We assume that the contacts between the wires and the section of metal are friction-les and that the metal can slide along the wires for a total distance of 1 m before exiting the railgun projectile. Our goal is to calculate what voltage that will cause the metal projectile to leave the railgun at the speed of sound (343 m/s), assuming it starts from rest. 15 cm x B = 0.80 T First, what constant force (in N) will accelerate the rod to the speed of sound in 1 m? Give your answer to 3 significant digits. Question 10 Next, which voltage V will generate the necessary current to create this constant force? Give you answer to 3 significant digits.