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Answer 1

hey dear
here is your answer ☆

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☞ according to newton's second law of motion, F = ma

F = m( v-u/t)

if no froce is applied to the object for motion then, F = 0, and putting value of F in above equation

0= m(v-u/t)
0= m(v-u)
0 = v-u
u=v

hence proved !!

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hope it helps ✌ ✌