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A ball of mass m attached to a string swings in a vertical circle, as shown. What is the tension in the string when the ball is at the top of the circle?

A ball of mass m attached to a string swings in a vertical circle as shown What is the tension in the string when the ball is at the top of the circle class=

Respuesta :

At the top the forces on the mass are the weight and the tension. Then by Newton's second law we have that the total force Fc is:

[tex]\begin{gathered} F_c=T+mg \\ T=F_c-mg \end{gathered}[/tex]

Therefore the answer is b.

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