A crate of mass 50 kg slides on a horizontal floor under the action of an applied horizontal force of 200 N and against a friction force of 120 N. Calculate (a) the acceleration, and (b) the applied horizontal force required to give the same acceleration with twice the mass and half the friction.

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: