Consider the system shown in the figure below with m1-20 kg, m2-12.5 kg. R-0.2 m, and the mass of the puilley M-5 kg. Object m2 is resting on the floor, and object m1 is 4 m above the floor when it is released from rest. The pulley axis is frictionless. The cord is massless, does not stretch, and does not slip on the pulley. a. Calculate the time interval required for m1 to hit the floor. b. How would your answer change if the pulley were massless?

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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: