In this problem we are going to try and understand where the acceleration in uniform circular motion comes from by considering some linear cases. show answer No Attempt 25% First consider a particle moving with a velocity v1 at an angle of θ1 with respect to the x-axis. During a time period Δt, the particle suddenly turns and travels at v2, at an angle of θ2 with respect to the x-axis. Give an expression for the average acceleration vector of this motion in terms of unit vectors i and j, assuming the angles are measured positive in the counterclockwise direction.