How Do You Calculate Instantaneous Speed from a Speed-Time Graph?

[BUTTER-BENZ]

1.) How is the instantaneous speed obtained from a speed-time graph?

2.) I ADDED A PICTURE OF A TIME GRAPH USED FOR THESE QUESTIONS:

http://i36.tinypic.com/wkh8gx.jpg

(the left numbers are distance, the bottom numbers are time (min)

A. which graph illustrates a constant speed for the whole trip?
B. which graph show a constantly changing speed?
C. which graph(s) has (have) an instantaneous speed of zero as some point?
D. what is the instantaneous speed at 1.0 min for each graph?
E. calculate the average speed for 0 to 5.0 min for each cyclist.
17 hours ago - 3 days left to answer.


THANK YOU SO MUCH IN ADVANCE

 

[BUTTER-BENZ]

How is the instantaneous speed obtained from a speed-time graph?

 

[LowlyPion]

1.) How is the instantaneous speed obtained from a speed-time graph?

2.) I ADDED A PICTURE OF A TIME GRAPH USED FOR THESE QUESTIONS:

http://i36.tinypic.com/wkh8gx.jpg

(the left numbers are distance, the bottom numbers are time (min)

A. which graph illustrates a constant speed for the whole trip?
B. which graph show a constantly changing speed?
C. which graph(s) has (have) an instantaneous speed of zero as some point?
D. what is the instantaneous speed at 1.0 min for each graph?
E. calculate the average speed for 0 to 5.0 min for each cyclist.
17 hours ago - 3 days left to answer.


THANK YOU SO MUCH IN ADVANCE

You have distance on one axis and time on the other.

What is speed? Is it distance divided by time by any chance?

At any point what is the rate of change? Isn't it the tangent at that point?