A 40-Kg Mass Attached to the End of a String Swings

question 25

Multiple Choice

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 $\degree$ 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

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