A 3.0-kg object hangs at one end of a rope that is
Chapter 4, Problem 4.68(choose chapter or problem)
A 3.0-kg object hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 4.0with the vertical, as shown in Figure P4.68. Find the acceleration of the car.
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