Problem 4-12 - Vector components - Part 6 - (C)

A car is travelling along a winding highway at a constant speed of $82\; km/h.$ At 3:00 p.m., the car is heading $38.2^\circ$ east of north, and at 3:15 p.m. it is heading $12.7^\circ$ south of east. Define the $+x$ and $+y$ directions to be east and north, respectively. Use Eq. 4-8 to determine the $x$- and $y$-components of the average acceleration during this time interval.  

Accumulated Solution

$82\; km/hr = 22.8\; m/s$

$v_{fx} = 22.8 \cos 12.7^\circ = 22.24\; m/s \\ v_{fy} = -22.8 \sin 12.7^\circ = -5.01\; m/s \\ v_{ix} = 22.8 \sin 38.2^\circ = 14.10\; m/s \\ v_{iy} = 22.8 \cos 38.2^\circ = 17.92\; m/s$

No. The time duration is $15 \;min$ not $15 \;s.$

Try again.