A 41.8 kg box is on a frictionless 20° slope and is connected via a massless string over a massless, frictionless pulley to a hanging 19.5 kg weight. a. What is the tension in the string if the 41.8 kg box is held in place, so that it cannot move?  (N) b. What is the tension in the string once the box begins to move?  (N)

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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: