Question

look at graph 9.
which section of graph 9 has the greatest slope? what can you say about the speed in this section? what can you say about the speed in section CD of the graph.​

Answer 1

Answer:(a)The section BC of the graph has greatest slope and speed (which is given by the slope of the graph can be easily calculated) by using the relation ∆x/∆t = speed( slope)

substitut ∆x by 20m and ∆t by 1 sec

u will get the answer.

(b) Speed is zero in section CD .In section CD u can again use the relation ∆x/∆t = speed

substitute ∆x =0 and ∆t=2 sec

u will get the answer

Here

∆x = change is distance

∆t= change in time

∆(delta) used to indicate changes..

I hope it is enough for u...

Explanation: