From the answer choices provided the one that is not an example of this is the process that give us day and night. This is because, the day/night cycle occurs as the Earth spins on it's axis. This cause one side of the Earth to be facing the Sun, which is the side that is currently experiencing day time while the other side is experiencing night time. As the Earth spins the cycles repeat. This is not an example of revolving.
The horizontal force : f = k*N k- coefficient of friction k = f /N N = m * g = 45 kg * 9.81 m/s² = 441.45 N k = 25 N : 441.45 N = 0.057 Answer C) 0.057
