Chapter 3, Problem 24PCE

The initial velocity of a car, ${\stackrel{\to }{\text{v}}}_{\text{i}}$, is 45 km/h in the positive x direction. The final velocity of the car, ${\stackrel{\to }{\text{v}}}_{\text{f}}$, is 66 krrvh m a direction that points 75° above the positive x axis. (a) Sketch the vectors $-{\stackrel{\to }{\text{v}}}_{\text{i}}$, ${\stackrel{\to }{\text{v}}}_{\text{f}}$, and $\Delta \stackrel{\to }{\text{v}}\text{=}{\stackrel{\to }{\text{v}}}_{\text{f}}-{\stackrel{\to }{\text{v}}}_{\text{i}}$. (b) Find the magnitude and direction of the change in velocity, $\Delta \stackrel{\to }{\text{v}}$.