of the force on the particle? (Calculate the magnitude and direction of the magnetic force). 3. A particle with a charge of 4.5 nC is moving west at a speed of 6,500 m/s in a region where there is a magnetic field of 0.30 T pointing north. If there is also an electric field in the same region and the particle is moving straight, what is the magnitude and direction of the electric field? (Use magnetic force in conjunction with electric force, or with other forces in Newton's 2"d law). A charged particle with a mass of 0.5 grams is moving at a constant speed of 750 m/s in a circular path