Question

What is the average speed of the marble as it rolls across the floor?



A.
15 m/s

B.
1.5 m/s

C.
0.67 m/s

D.
150 m/s

http://static.k12.com/calms_media/media/1357500_1358000/1357616/1/ed59913ff279023148dd2d2f57054694360e8660/MS_PHYS_SCI_286554.jpg

Answer 1

c trust me i know

Answer 2

Yes, its C

Answer 3

ya do i get a medal and friend like

Answer 4

By the time it reached the (1) on the distance scale it was not even (1) on the time scale, so it can only be C .

Answer 5

Oh okay can you explain?

Answer 6

Just did.

Answer 7

Sorry OS is running slow

Answer 8

Lol, I feel you.

Answer 9

Average speed is distance/time.
Look at your graph.
Distance is plotted vertically, like y.
Time is plotted horizontally, like x.
The difference in y divided by the difference in x is the slope.
In your case, distance divided by time is speed.
If you find the slope of the graph, you'll have the speed.

Answer 10

Thanks @mathstudent55

Answer 11

The answer above, C, is incorrect.

Answer 12

o.o that's confusing....

Answer 13

I have a couple more could you help?

Answer 14

well did you get the question corect

Answer 15

waaa?

Answer 16

If something travels 1 m in less than 1 sec, then the speed is greater than 1 m/s, not less.

Answer 17

Oh it's like a quiz we'll see when I finish

Answer 18

... It is C. I think your reading the graph wrong.

Answer 19

Look for two points that are easy to read off the graph.
That means, two points that are on grid line intersections.
I chose (0, 0) and (4, 6) as shown below.