A particle has initial velocity (2i−j)(2\mathbf{i}-\mathbf{j})(2i−j) m s−1^{-1}−1 and constant acceleration (3i+4j)(3\mathbf{i}+4\mathbf{j})(3i+4j) m s−2^{-2}−2.
Find the velocity of the particle after 3 s.
Find the displacement of the particle during the first 3 s.