Question

hhh

Answer 1

@peachpi @Vocaloid

Answer 2

b

Answer 3

because he went 20 miles in an hour he was going 20mph

Answer 4

@iwanttogotostanford

Answer 5

or would it be 0?? because there was really no change"

Answer 6

yeah i was reading worng sorry

Answer 7

it would be zero

Answer 8

thats what I thought are you sure?? @g-lax4

Answer 9

speed is change in distance divided by change in time
in this graph, that is the slope of the line
slope is change in y (distance here) divided by change in x (time here)

a horizontal line has 0 slope, which means 0 speed.

We do have to assume the travel is in a straight line. If we were moving on a circle, the distance could be the same as we moved in a circle. But I assume they are not allowing that.

Answer 10

yeah they just gave me the graph- i am thinking 20 or 0 but i am stuck

Answer 11

@phi

Answer 12

From hour 1 to hour 2, the position stays at 40. that implies you are not moving
not moving means a speed of 0

Answer 13

well it says only during the second hour and it doesn't change?? it just goes at a constatnt

Answer 14

i think it would be zero

Answer 15

Imagine you walk along a straight road. Over time you get further away from the start.
then you stop for 1 hour. The distance will not change during that hour.
If you plot it, you will show a line at 40 going across for 1 hour

Answer 16

yes

Answer 17

But if the problem does not say you are moving along a straight line, you should complain to your teacher. You could move on a circle (which means you have some speed), but the distance would not change (all points on a circle are the same distance from the center)
In other words, if you allow moving in a circle, it is possible to have non-zero speed, but on your graph, the distance from the start would be the same number.

Answer 18

No, the speed is zero. (I assume they are not being tricky here)
if the graph shows the distance is not changing, then that means you are not moving.

Answer 19

ah ok. Thank you!