The position vector of an object is given by r(t)= (2 m/s) t i+ (5 m/s) t j. The object is confined to moving on the XY plane. The mass of the object is 10 kg.

Find the net force acting on the object at t = 3s. Find the angle between the position vector, r(t), and the velocity vector, v(t), of the object at t = 1s. Plot the Y-component of the velocity and the magnitude of the total acceleration as a function of time. (Plot Vy-t graph and a-t graph)