- #1
a.k
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Homework Statement
A motorboat traveling in a straight line has a velocity of +4.0 m/s at some point in time. After 5.0 seconds, its velocity is +7.0 m/s. What is its average acceleration during this time?
Homework Equations
avg accel.=change in velocity/change in time
The Attempt at a Solution
7.0 m/s-4.0 m/s=3.0 m/s
[itex]\frac{3 m/s}{5s}[/itex]
0.60 m/s^2.
I don't understand why is it m/s^2 versus m/s. What does the plus sign indicate in the question in front of 7.0 and 3.0?