Remember vave = (y(t2)-y(t1))/(t2-t1)
you got the right answer in the first because 2 - 1 is 1
but in the second t2 -t1 = .5
so divide you result by .5
If a rock is thrown upward on the planet Mercury with a velocity of 12 m/s, its height in meters t seconds later is given by y = 12t - 1.86t^2.
Find the average velocity for the time period [1, 2].
Well, I did it and got it right:
Plugged 1 into the equation and got 10.14. Then plugged 2 in and got 16.56.
16.56-10.14 = 6.42
Now for the second part: [1, 1.5].
I did the same thing and got 13.185-10.14 = 3.675 and I got it wrong for some reason...
UPDATE: Haha, I forgot to divide by .5. NVM Then, please delete this thread.