Question

A body moving along a straight-line at 20s undergoes an acceleration of 4m/sâ.After two seconds its speed will be .... ?

Answer 1

Explanation:

initial speed(u) =20

final speed(v) =v

a=4

using first law of motion

v=u+at

$v =20 + 4 \times 2$

v=28m/s

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