Q a rock of mass m 17 kg is tied to a string of length l

Reference no: EM13354705

Q1. A rock of mass m = 1.7 kg is tied to a string of length L = 1.6 m and is twirled in a vertical circle. The speed v of the rock is constant; that is, it is the same at the top and the bottom of the circle. If the tension in the string is zero when the rock is at its highest point (so that the string just barely goes slack), what is the tension while rock is at the bottom?

Q2. A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily?

Reference no: EM13354705

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