A particle of mass 0.50kg has an initial velocity u=4i^+3j^ms−1. A constant force F=2i^N acts on it for 2s. What is the particle’s speed immediately after the force ceases?
a) 15.0\,\text{m\,s}^{-1}
b) 6.7\,\text{m\,s}^{-1}
c) 12.4\,\text{m\,s}^{-1}
d) 11.7\,\text{m\,s}^{-1}