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a) what is the speed of the ball

b) what is the tension in the rope

i am stuck on this problem because i do not have a unit time to be able to use any of the equations dealing with circular motion

i started out with knowing that the radius will be the cos40*1.37m = 1.05 m

but after that i'm always left with two unknowns for any equation. any hints on what i could be missing.....thanks!