figure out how long the whole trip took
t = 11.2/52 + 23.2/40 + 48.2/31.9
and
how many miles total?
d = 11.2 + 23.2 + 48.2
then
average speed = d/t
A car travels along a straight stretch of road.
It proceeds for 11.2 mi at 52 mi/h, then
23.2 mi at 40 mi/h, and finally 48.2 mi at
31.9 mi/h.
What is the car’s average velocity during
the entire trip?
2 answers
since the was no change in direction, the speed is the magnitude of the velocity with no directions specified.
( poor wording of question, velocity is a vector with magnitude and DIRECTION. Speed is just a scalar. For speed use a speedometer. For velocity you need the speedometer AND a compass)
( poor wording of question, velocity is a vector with magnitude and DIRECTION. Speed is just a scalar. For speed use a speedometer. For velocity you need the speedometer AND a compass)
1 answer