[填空题]
A delivery truck travels r +xe41lgl-tw g52-v ljmm:bhjh-7ni d3 j3v8+al neebp qn:bv8wz/k z-do:1 18 blocks north, 10 blocks east, and 16 blocks south. What is its final dnv w8: j:-kpead zo/+end vlbb3zq138isplacement from the origin? Assume the blocks are equal length. blocks
参考答案: 10±2%
本题详细解析: The truck has a displacement of 18+(-16)=2 b 5h,re *l0/j-n6) jrtrhjzzeslocks north and 10 blocks east. The resuljrez,6/slet -hnzr5h*rj) j 0tant has a magnitude of $ \sqrt{2^{2}+10^{2}}=10 $ blocks and a direction of $\tan ^{-1} 2 / 10=11^{\circ}$ north of east.
