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雷军称两辆车以 60km/h 速度对撞相当于 120 公里速度撞墙,这个说法在物理学上正确吗?

intermediate知乎1 min read
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Translation
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Key Vocabulary

deHSK1

(used after an attribute when it modifies a noun)

碰撞pèng zhuàngHSK6

to collide

速度sù dùHSK4

velocity

两辆车liǎng liàng chē
shìHSK1

to be (followed by substantives only)

雷军léi jūn
安全ān quánHSK3

safe; secure

引爆yǐn bào
能量néng liàngHSK6

capabilities

HSK5

old variant of 以[yi3]

正面zhèng miànHSK6

obverse side

相当于xiāng dāng yú
这个zhè gèHSK1

(pronoun) this

小米xiǎo mǐ
shàngHSK1
yuèHSK3

to exceed

工况gōng kuàng
新一代xīn yī dài
leHSK1

to understand clearly

物理学wù lǐ xué
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雷军称两辆车以 60km/h 速度对撞相当于 120 公里速度撞墙,这个说法在物理学上正确吗? - ISCBJ