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1) 1) A car travels at 40 mph for 2 hr and 60 mph for 3 hr. What is its average speed?
2) Speed is the magnitude of instantaneous velocity. Is the average speed equal to the magnitude of the average velocity? Justify your answer.
3) Under what condition is the average speed equal to instantaneous velocity?
1 Answer
- billrussell42Lv 710 years agoFavorite Answer
No, Average speed is total distance divided by total time.
That is the correct definition, there is no justification needed. Your definition is incorrect.
Average speed is equal to average velocity as long as the motion is in a straight line.
