6. A constant force F is applied for 2s to change the particle's velocity from v₁ to Va. Determine the force F if the particle's mass is 2 kg. a. (17.3 j) N b. (-10i+17.3 j) N c. (20i + 17.3j) N d. (10i + 17.3j) N vy-20 m/s m/s