There are (one can say) three coequal theories of motion for a single particle: Newton’s second law, stating that the total force on the particle causes its acceleration; the work-kinetic energy theorem, stating that the total work on the particle causes its change in kinetic energy; and the impulse-momentum theorem, stating that the total impulse on the particle causes its change in momentum. In this problem, you compare predictions of the three theories in one particular case. A $$3.00-kg$$ object has velocity $$7.00\hat{j}\ m/s$$. Then a constant net force $$12.0\hat{i}N$$ acts on the object for $$5.00\ s$$.
Calculate its acceleration from $$\vec{a}$$ = $$\frac{(\vec{v_f} - \vec{v_i})}{\Delta{t}}$$