Acar is moving southwest at a velocity of 10 meters per second. five seconds later, it's going 40 meters per second. what was the car's average acceleration during this time?

If "during this time" refers to the 5 second interval mentioned above, then the average acceleration is

Notice that we took the start time to be the start of the 5 second interval and set that to . The starting velocity is the velocity measured at the start of the interval, and is the velocity measured at its end.

So the average velocity over these 5 seconds is

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

graphing motion: mastery test

209be

what is the instantaneous acceleration of

the particle at point b?

0 meters/second?

10 meters/second?

12 meters/second?

velocity imetersisecond

15 meters/second?

20

time (seconds)

answer: 0 meters/second^2