Question

In a long distance race, the athletes were expected to take four rounds of the track such that the line of finish was same as the line of start . the motion of the athlete is non- unifor. why?​

Answer 1

Explanation:

When finish line is same as that of initial line , it means length of one round =

2 × Length of track = 2 × 200 = 400 m

(a) total distance covered by athletics =

4 × Length of one round

= 4 × 400 = 1600 m = 1.6 Km = 1 mile

(b) displacement covered by athletics = final position - inital position =0

{ we know, accroding to question one round equal final position is same as initial position so, displacement in one round = 0 hence, displacement in 4 rounds = 0}

(C) we probably say that motion of athletic is non - uniform motion

becoz in question , never include about athletic speed , { e.g constant or not }

but practically athletic moves non - uniform motion , becoz sometime he accelerates own motion , sometimes do slow .

(d) never !!!

because , displacement = 0

but distance = 1600m = 1.6 km

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