Question

Train starting from rest moves with uniform acceleration of 5 m/s².find the its velocity when it has travelled a distance of 1 km. (1 point) 110 m/s 100m/s 120 m/s 130 m/s

Answer 1

Answer:-

Given:-

➽ Initial velocity (u) = 0 m/s

➽ Acceleration (a) = 5 m/s²

➽ Distance (s) = 1 km = 1000 m

To Find:-

Final velocity (v) after travelling a distance of 1 km.

______________...

We know,

➽ 2as = v² - u²

Or, v = √2as (u = 0; 0² = 0) (whole root)

∴ v = √2 × 5m/s² × 1000 m

➵ v = √10 m²/s² × 1000

➵ v = √10000 m²/s²

➵ v = √(100 m/s) × (100 m/s)

➽ v = 100 m/s

Or, v = 360 km/h (Multiply with 18/5) ...(Ans.)