Carl started to run at 10 km/h when he left his house. He arrived at school 30 minutes later. How fast was he
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Carl started to run at 10 km/h when he left his house. He arrived at school 30 minutes later. How fast was he

[From: ] [author: ] [Date: 12-01-27] [Hit: ]
Answer .. He arrived at school 30 minutes later means “he has traveled for 30 minutes,At first glace I mistook the sentence as if he is late by half an hour to school.......
please include how did you arrive to your answer

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Carl started to run at 10 km/h when he left his house. He arrived at school 30 minutes later. How fast was he running when he arrived there? Assume that his average acceleration was 30 km/h2. the answer is 25 km/h but i dont know how u can find it

http://library.thinkquest.org/10796/ch3/…

section 2 third question.

Answer .

. He arrived at school 30 minutes later means “he has traveled for 30 minutes, half an hour”

At first glace I mistook the sentence as if he is late by half an hour to school.

Initial velocity = 10 km /h
acceleration = 30 km/h^2

final velocity = initial velocity + at = 10 + 30* (1/2) = 25 m/s
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