5.12. The coefficient of friction between the block of mass mı = 3.00 kg and the surface in 'Figure
P5.12 is uk
0.400. The system starts from rest.
What is the speed of the ball of mass m2 5.00 kg
when it has fallen a distance h = 1.50 m?
Ans. 3.74 m/s
Figure P5.12

The correct choice is c

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.

Answer it orbits high above earth to gain clearer images of light, it magnifies images relative to the human eye, it records most of the universe as it was in the past, not as it is now;

Hi. i believe this is called a scientific  theory.cheers!