Which of the following best demonstrates the effect of static friction? a. a person pushing a couch and it slowly sliding across a floor b. a person moving a ball through a stream of water c. a person dropping a ball to the ground. d. a person pushing a couch without being able to move it

 B. A person moving a ball through a stream of water

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.