Question

a ball is round on a string at 35° with respect to the vertical. if the length of the string is 12cm. how fast must be the ball is spinning?

Answer 1

`\sqrt{ (g)/(12 \cos(35) ) }`

where g is acceleration due to gravity

Explanation:

You should consider the tension in the string along the horizontal and vertical axis as well as the force of gravity acting on the ball.