You spin an 800-gram mass on a thin string of length 0.5 m around your head. If the tension in the string is greater than 12 N, the string will break. You start to string the mass around your head faster and faster: a) At what angle from the vertical will the string break?
b) At what velocity will the string break?

Since the pully is a simple machine so the mechanical advantage is a 1

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.