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° with the vertical as shown, the speed of the mass is 5.0 m/s. At this instant what is the magnitude of the force the string exerts on the mass?





a.

50 N



b.

82 N



c.

89 N



d.

11 N



e.

61 N


b

Physics & Space Science

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