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A boat is traveling at 43.2km/hr. It then goes down a faster part of the river and is now going 144km/hr which gave the boat an acceleration of 25.2km/hr squared . How long did it take the boat to reach its new speed

User Fadli
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2 Answers

7 votes

Explanation:

with this we would use the first equation of motion.


v = u + at

making t the subject of the equation


t = (v - u)/(a)

where v is 144 km/h and u 43.2 km per hour and a is 25.2 kilometres per square hour.


t = (144 - 43.2)/(25.2)


t = 4 \: hr

therefore the time taken for the boat to reach its new speed is 4 hours.

User Attila Fulop
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0 votes

Answer:

43.2 + 25.2h = 144

25.2h = 100.8

h = 4 hours

User Calvin Froedge
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