a train starting from rest moves with uniform acceleration of 5 metre per second find its velocity when it has travelled a distance of 1 km CBSE answer
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Answer:
Acceleration (a) = 5 ms⁻²
Distance (s) = 1 Km ⇒ 1000 m [Convert Km into m]
Initial velocity (u) = 0 ms⁻¹ [Because the train is starting from rest]
Final velocity (v) = ?
Let's recall the three Equations of Motion:
- v = u + at.
- v² = u² + 2as.
- s = ut + ½at²
We are given Acceleration, Distance, Initial velocity and we need to find Final velocity.
According to the given data, it is apt or appropriate to use v² = u² + 2as formula.
Substitute the values of a, u and s.
v²=0²+2×5×1000
v²=10000
v=√10000
v=100ms⁻¹
THUS, THE TRAIN ATTAINS 100ms⁻¹ VELOCITY AFTER TRAVELLING 1 Km.
Remember:
- Write the given data.
- Convert the units if they are not the same.
- Write the appropriate equation.
- Re-check the calculation.
- Write the units after obtaining the final answer.
HOPE THIS HELPS :D
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