Question

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Answer 1

The First Law of Motion is :

an object continues to be in a state of rest or of uniform motion along a straight line unless acted upon by an unbalanced force.

Derivation of first Law of motion:

F = ma 

or F = m(v-u) / t

or Ft = mv - mu

That is, when F = 0, v = u for whatever time, t is taken. This means that the object will continue moving with uniform velocity, u throughout the time, t. If u is zero than v will also be zero, i.e., object will remain at rest.

Answer 2

hope it's helpful....