A small ball is tied to a string and set rotating with negligible friction in a vertical circle. If the ball moves over the top
of the circle at its slowest possible speed (so that the tension in the string is negligible), what is the tension in the string at the bottom of the circle, assuming there is no additional energy added to the ball during rotation?
An explanation would be very much appreciated as there are a few things I am confused about
- why is tension negligible at the top? Isn't there still a tension force pulling inward? I thought there would be two forces acting on the ball at the top of the circle, Fg and
?
- is finding a numerical value for this answer even possible? we don't have the mass of the ball
An explanation would be very much appreciated as there are a few things I am confused about
- why is tension negligible at the top? Isn't there still a tension force pulling inward? I thought there would be two forces acting on the ball at the top of the circle, Fg and
- is finding a numerical value for this answer even possible? we don't have the mass of the ball
1 answer:
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