Duplicate Question
The question on this page has been marked as a duplicate question.
Original Question
A commuting student leaves home and drives to school at an average speed of 41.0 km/h. After 24.0 min she realizes that she has...Asked by Lauren
A commuting student leaves home and drives to school at an average speed of 42.0 km/h. After 20.0 min he realizes that he has forgotten his homework and returns home to get it at the same average speed. It takes 7.0 min to find the report, after which the trip to school 42.0 km away to the east is resumed at the same speed as before.
What is the average speed for the entire trip ?
What is the average velocity for the entire trip?
What is the average speed for the entire trip ?
What is the average velocity for the entire trip?
Answers
Answered by
Henry
a. d1=42km/h*(40/60)h =28 km.
t1 = 28/42+7/60 = 0.783 h
d2 = 42km to school.
t2 = d2/r = 42km/42km/h = 1 h.
D = d1 + d2 = 28 + 42 = 70 km = Total driving distance.
Speed=D/(t1+t2)=70/(0.783+1)=39.25 km/h
t1 = 28/42+7/60 = 0.783 h
d2 = 42km to school.
t2 = d2/r = 42km/42km/h = 1 h.
D = d1 + d2 = 28 + 42 = 70 km = Total driving distance.
Speed=D/(t1+t2)=70/(0.783+1)=39.25 km/h
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.