science
grade-9
Easy
Question
A train starts from rest and picks up a velocity of 20 m/s in 4 s. The acceleration of the train is ___ m/s2.
The correct answer is: 5
Initial velocity = 0
Final velocity = 20 m/s
Time taken = 4 s
Acceleration = (v – u)/t
= (20 – 0)/4
= 5 m/s2.
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