Weight on a string

• Tie a large washer to a string and (carefully) whirl it in a vertical circle. When the washer is at its lowest point, is the tension in the string greater than, less than, or equal to the ball’s weight? Explain.(You may want to include a free-body diagram as part of your explanation.)
• What is the tension in the string when the speed is slow enough for the washer to just basely make it over the top?
• Calculate the minimum speed needed to just get over the top. At that same speed, what is the tension on the string at the bottom?