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1. A 100g bead is free to slide along a 80cm piece of string ABC. Points A and B of the string are attached to a vertical pole 40 cm apart. When the pole is rotated AB becomes horizontal.
I have attached a diagram of the question.
Find the tension in the string?
Find the speed of the ball at point B?
Relevant Equations
F = mv^2/r
a = v^2/r
F = ma
Attempt:
I know that the centripital force acting on the object must be equal to the Tension acting in the horizontal direction. Also the radius of the string when the bead is at point B is a function of the angle. I also believe that the vertical force acting on the string must be equal to the downward force of gravity. Therefore so far I have:
1. radius = 40/tan0
2. a = v^2/(40/tan0) (this is when subbing in for r the above equation)
3. Ty = mg = 0.98
I am not sure where to go from here, or even if I am starting off right. Any help would be appreciated.
Thanks
I have attached a diagram of the question.
Find the tension in the string?
Find the speed of the ball at point B?
Relevant Equations
F = mv^2/r
a = v^2/r
F = ma
Attempt:
I know that the centripital force acting on the object must be equal to the Tension acting in the horizontal direction. Also the radius of the string when the bead is at point B is a function of the angle. I also believe that the vertical force acting on the string must be equal to the downward force of gravity. Therefore so far I have:
1. radius = 40/tan0
2. a = v^2/(40/tan0) (this is when subbing in for r the above equation)
3. Ty = mg = 0.98
I am not sure where to go from here, or even if I am starting off right. Any help would be appreciated.
Thanks
Homework Statement
Homework Equations
The Attempt at a Solution
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