A 2.0-kg mass swings at the end of a lightstring (length=3.0m). Its speed at the lowest point on its circularpath is 6.0m/s. What is the kinetic energy at an instant when thestring makes an angle of 50oWiththe vertical?
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A 4.0 kg mass attached to the end of a string swings in a vertical circle of radius 2.0 m. When the string makes an angle of 35 degrees with the vertical, the speed of the mass is 5.0 m/s. At this instant what is the magnitude of the force on the mass by the string?
A 0.20 kg ball attached to the end of a string swings in a vertical circle having a radius of 1.4 m. At an instant when the string makes an angle of 40 degrees above the horizontal, the magnitude of the tension in the string is 3.0 N. What is the speed of the ball at this instant?
