Car X travels due east at while car Y travels due north at

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

Car X travels due east at

60\,\text{km}\,\text{h}^{-1}

while car Y travels due north at

80\,\text{km}\,\text{h}^{-1}

. What is the speed of car Y relative to car X? (a)

20\,\text{km}\,\text{h}^{-1}

(b)

100\,\text{km}\,\text{h}^{-1}

(c)

140\,\text{km}\,\text{h}^{-1}

(d)

84\,\text{km}\,\text{h}^{-1}