A 2.0 kg ball swings in a vertical circle on the end of an 80-cm-long string. The

Question:

A 2.0 kg ball swings in a vertical circle on the end of an 80-cm-long string. The tension in the string is 20 N when its angle from the highest point on the circle is θ = 30°.
a. What is the ball’s speed when θ = 30°?
b. What are the magnitude and direction of the ball’s acceleration when θ = 30°?

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