Question

how do i find average velocity?

Answer 1

total distance divided by total time :)

Answer 2

\[v _{ave}= \Delta displacement/\Delta time\]

Answer 3

average velocity is variation of speed divided by variation of time

Answer 4

Use displacement, not distance

Answer 5

yep

Answer 6

So for example, if you went 10m East in 5 seconds, your average velocity would be 10m/5s = 2m/s

Answer 7

What is the average velocity of the car between t = 0 and t = 50 s?

Answer 8

how much that car has moved in meters?

Answer 9

We need to know the change in position

Answer 10

thats all i got so far

Answer 11

its not 50/0 lol

Answer 12

??

Answer 13

stuck?

Answer 14

wtf! I lost my answers I gave you..weird!

Answer 15

try this again

Answer 16

ok

Answer 17

ok, the car is moving on a line. Remember the y-axis is the cars velocity NOT it's position. Since the velocity is always positive, the car is always moving in the same direction and never turns around and goes back (if it did, we would have negative values for the velocity). The change in position then is just the total distance travelled which is 2km=2000m according to your screenshot. The average velocity is 2000m/50s=40m/s

Answer 18

says 40 is wrong

Answer 19

it says this
Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully

Answer 20

???? does it want the answer in m/s?

Answer 21

Are we talking average velocity here or average acceleration?

Answer 22

Determine the average acceleration of the object in the following time interval t = 7.50 s to t = 22.5 s.

Answer 23

m/s^2

Answer 24

Oh! That's a totally different question. I solved the average velocity for the entire trip.

Answer 25

lol
oh lord

Answer 26

Ok, we need to divide the change in velocity by the change in time. Time is easy 22.5-7.5=15.0s. It looks to me like the velocity at 7.5s is 20m/s (these can be difficult to estimate from a graph on a computer screen though). The final velocity is 50m/s. The change is therefore 30m/s. Average acceleration is (30m/s)(15s)=2m/s^2

Answer 27

sorry I didn't put in the division sign above hehe

Answer 28

Hope this is correct, I got to go! If it is wrong my estimate of the velocity at 7.5s could be off!

Answer 29

so u think its 50?

Answer 30

im sorry...30

Answer 31

its not 50 or 30 lol