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scrubber
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Homework Statement
A small ball of mass 0.50 kg is attached to a cord and perform uniform-speed circular motion of radius 2.0 m in a vertical plane.
i) If the speed of the circular motion is 10m/s, determine the tension in the cord at the lowest point of the circular motion.
ii) Determine the minimum possible speed of this circular motion.
Homework Equations
radical acceleration = v^2/r
Fnet=ma
The Attempt at a Solution
i) T-mg=mAc, where Ac is the radical acceleration.
T=mAc+mg=m(Ac+g)=0.5*(10^2/2+9.81)=30N
ii) At the top position,
mg-T=mAc
T=0 for minimum speed,
mg=mAc=m(v^2/r)
v=√(gr)=√(9.81*2)=4.4m/s