英文数学(速度,一定要快)The braking distance(d metres)of a truck is proportional to the square of its speed(Vkm/h).If d =10,when v=36,calculate(a) d when v = 60(b)v when d=144 帮忙做出并要有过程和解释

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英文数学(速度,一定要快)The braking distance(d metres)of a truck is proportional to the square of its speed(Vkm/h).If d =10,when v=36,calculate(a) d when v = 60(b)v when d=144    帮忙做出并要有过程和解释

英文数学(速度,一定要快)The braking distance(d metres)of a truck is proportional to the square of its speed(Vkm/h).If d =10,when v=36,calculate(a) d when v = 60(b)v when d=144 帮忙做出并要有过程和解释
英文数学(速度,一定要快)
The braking distance(d metres)of a truck is proportional to the square of its speed(Vkm/h).If d =10,when v=36,calculate
(a) d when v = 60
(b)v when d=144
帮忙做出并要有过程和解释

英文数学(速度,一定要快)The braking distance(d metres)of a truck is proportional to the square of its speed(Vkm/h).If d =10,when v=36,calculate(a) d when v = 60(b)v when d=144 帮忙做出并要有过程和解释
原题目:刹车距离与速度平方成正比,当d=10时V=36 (a)当V=60时,求d
(b)当d=144时,求V
解题步骤:设方程为d=kV²,将d=10,v=36带入可解得k=10/(36*36)
(a)将v=60带入原方程得d=250/9
(b)将d=144带入原方程得V²=144*36*36/10则v=(432√10)/10 (其中√为根号)

题目意思:距离D与V的平方成正比,
设D=KV²,V=36时,D=10,解得K= 10/36²
a,,v=60时,D=D=KV²=10/36²*60²=27.8
b,d=144时,D=KV²,带入数据解得,V=136.1嗯,谢谢,再帮我回答一个就给分 a photocopier enlarges by a rat...

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题目意思:距离D与V的平方成正比,
设D=KV²,V=36时,D=10,解得K= 10/36²
a,,v=60时,D=D=KV²=10/36²*60²=27.8
b,d=144时,D=KV²,带入数据解得,V=136.1

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