an object moves along a straight line with an acceleration of 2m/s2 if its initial speed is 10m/s what will be its speed 5s later

We have,
initial velocity, u = 10 m/s
acceleration. a = 2 m/s​2 
final velocity, v = ?
time, t =5 sec

now, v = u + at= 10 + 2 × 5= 10 + 10= 20 m/sso, its velocity after 5 sec is 20 m/s.

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