A 18.5 kg ball is thrown at an angle of 49° above the horizontal off of a building such that its initial potential energy is 449 J, and the initial kinetic energy is 458 J.

Once the ball is flying in its arc, what will be the potential energy of the ball when the kinetic energy is 71.1 J?

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.

All are great precautions but you can still lift lighter and different muscles in between hard workdays. this keeps other muscles not usually used in shape.