an object dropped from cliff falls with a constant acceleration of 10m/s2 find its speed after 2s after it was dropprd

We have,
initial velocity, u = 0 m/s
acceleration. a = 10 m/s​2
final velocity, v = ?
time, t = 2 sec
v = u + at= 0 + (10) × 2= 20 m/s

So, after 2 sec, its velocity is 20 m/s.
 

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