Using appropriate technology, you determine that Earth's magnetic field at your location has a magnitude of 5.97 x 10-5T and is directed north at an angle of 61° below the horizontal. You charge a metallic projectile and fire it north with a speed of 657 m/s and at an angle of 14° above the horizontal. Determine the sign (+ or -) and charge of the projectile, if the magnetic force on the projectile is 3.23 x 10-10 N, directed due west.

Using appropriate technology, you determine that Earth's magnetic field at your location has a magnitude of 5.97 x 10-5T and is directed north at an angle of 61° below the horizontal. You charge a metallic projectile and fire it north with a speed of 657 m/s and at an angle of 14° above the horizontal. Determine the sign (+ or -) and charge of the projectile, if the magnetic force on the projectile is 3.23 x 10-10 N, directed due west.