6 kilogram block initially at rest in pulling to the right along horizontal Surface by Cornerstone horizontal force of 12 Newtons find the speed of block it has moved 30 meter is the surface in contact have a full versions of kinetic friction of 0.50​

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system