Question

QUESTION 3 The motion of an object where the resultant force acting on it is zero, is described by Newton's 3rd Law Newton's 1st law The law of the conservation of momentum Newton's 2nd law

Answer 1

Remember that Newton's 1st law says that any object will remain at rest or continue moving, until external force is applied.

Newton's 2nd law: F_net = m*a

So here given scenario cannot be described by Newton's 1st law, since external force is applied, But since also given that net force on object is zero, So

F_net = 0

m*a = 0

a = 0

a = acceleration = dV/dt = 0

So, V = Constant

So object will keep moving with constant speed

So above situation can be explained by Newton's 2nd law.

Correct option is D.

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