A particle of mass 2 kg is acted on by a constant resultant force (6i−8j) N(6\mathbf{i}-8\mathbf{j})\text{ N}(6i−8j) N. At time t=3 st=3\text{ s}t=3 s its velocity is (−5i+2j) m s−1(-5\mathbf{i}+2\mathbf{j})\text{ m s}^{-1}(−5i+2j) m s−1.
Find its velocity at t=0t=0t=0.
Find its speed at t=0t=0t=0.