The velocity of a 6 kg particle is given by v→ = (2t i^ + 5t2 j^) m/s, with time t in seconds. At the instant the net force on the particle has a magnitude of 40 N, what are the direction (relative to the positive direction of the x axis) of (a) the net force and (b) the particle's direction of travel? (a) Number Units (b) Number Units