A ball of mass m = 0.200 kg is attached to a (massless) string of length L = 1.00 m and is undergoing circular motion in the horizontal plane, as shown in the figure.

a) Draw a free-body diagram for the ball.
b) Which force plays the role of the centripetal force?
c) What should the speed of the mass be for θ to be 45.0°?
d) What is the tension in the string?
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