A rock of mass m = 0.82 kg is attached to a massless string of length L = 0.72 m. The rock is swung in a vertical circle faster and faster up to a speed of v = 2.7 m/s, at which time the string breaks. This occurs when the string is horizontal as shown in the figure. a. What is the magnitude of the tension, in newtons, at which the string breaks?  b. How high, in meters, does the rock travel? Use a value of h = 0 at the location of the break.

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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: