An object travels North at # 2 m/s# for #1 s# and then travels South at # 4 m/s# for # 9 s#. What are the object's average speed and velocity?
1 Answer
Average velocity =
Average speed =
Explanation:
We will deal with speed first. Speed is how far something travels per second.
North -
South -
Total distance travelled = 2+36=38m
Total time = 2 + 9 = 11s
Average velocity:
As average takes direction into accpunt as well, the north value will be taken as positive, and the south value as negative (opposite directions, think add and subtract).
North -
South -
Total displacement = 2-36=-34m
Total time = 2 + 9 = 11s
As the value for average velocity is negative, and so is the inital south value, the average velocity is therefore