Question

a 100 m sprinter uniformly increases his speed from rest at the rate of 1m/s square how much gime does he take to complete the race what is his final speed​

Answer 1

Answer:

Time taken to complete the race = 5√2 s

Final speed = 10√2 m/s

Explanation:

Distance = s = 100 m

Initial speed = u = 0 m/s

Acceleration = a = 1 m/s²

Time taken = t

Final speed = v

v²-u² = 2as (Third equation of motion)

=> v²-0 = 2×1×100

=> v² = 200

=> v = √200

=> v = 10√2

s = v×t

=> t = s/v

=> t = 100/10√2

=> t = 10/√2

=> t = 5√2

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