Traditional Culture Encyclopedia - Tourist attractions - During the National Day holiday, Xiao Ming’s family went on a trip by car. Along the way, the kinematics knowledge he learned helped him solve many practical problems. (1) Sutra
During the National Day holiday, Xiao Ming’s family went on a trip by car. Along the way, the kinematics knowledge he learned helped him solve many practical problems. (1) Sutra
(1) "Zhenjiang 18km" means that there is still 18km from the sign to Zhenjiang,
"40" means that the driving speed of the car cannot exceed 40km/h;
(2) ∵v=st,
∴The minimum time required to reach Zhenjiang from the location of this sign:
t=sv=18km40km/h =0.45h=27min．
Answer: (1) There is still 18km from the sign to Zhenjiang, and the driving speed of the car cannot exceed 40km/h;
(2) From the location of the sign to Zhenjiang, it is at least It takes 27 minutes.
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