AP Physics 1easymcq1 pt
A car travels 40 km north in 2 hours, then 60 km east in 3 hours. What is the car's average speed for the entire trip?
A.16.7 km/h
B.20.0 km/h
C.33.3 km/h
D.50.0 km/h
Explanation
Core Concept
Average speed is total distance divided by total time. The car travels 40 km + 60 km = 100 km in 2 hours + 3 hours = 5 hours. Therefore, average speed = 100 km / 5 h = 20.0 km/h. Option A incorrectly uses displacement instead of distance. Option C incorrectly divides the total distance by only the second time interval. Option D incorrectly adds the two speeds (40/2 + 60/3) and divides by 2.
Correct Answer
B20.0 km/h
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