Me out to solve this problem because it looks difficult

the time when he starts to deaccelerate will be =

distance between a and b at the starting = x-y = 12.6m

Explanation:

writing equation of motion for traveller A v = u + at

where v is the final  u the initial velocity and a is the acceleration

u = 10 v= 8 and a = -5 applying the values in the equation we get t =

therefore athlete A deaccelerates from 10 to 8 m/s in s

so the time when he starts to deaccelerate will be = 2 -

                                                                                    =

writing equation of motion for B

v = u + at

where v= 8 u = 0 and t = 2

therefore applying the values a= 4

therefore distance travelled be B in 2 =

therefore   =x+ 8m

for traveller b distance travelled in 2  = y + 10× + 10× + -5×

= y+19.6 m

given

therefore x-y-11.6 = 1

therefore distance between a and b at the starting = x-y = 12.6m

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

are you like autistic or something?

xd