A 2.0-kg mass swings at the end of a light string (length = 3.0 m).Its speed at the lowest point on its circular path is 6.0 m/s.What is its kinetic energy at an instant when the string makes an angle of 50$\degree$ with the vertical?
A)21 J
B)15 J
C)28 J
D)36 J
E)23 J

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The Answer of A 2.0-kg mass swings at the end of a light string (length = 3.0 m).Its speed at the lowest point on its circular path is 6.0 m/s.What is its kinetic energy at an instant when the string makes an angle of 50$\degree$ with the vertical?
A)21 J
B)15 J
C)28 J
D)36 J
E)23 J

A 20-Kg Mass Swings at the End of a Light String