A team of eight dogs pulls a sled with waxed wood runners on wet snow (mush!). The dogs have average masses of18.0kg, and the loaded sled with its rider has a mass of225kg. A.) Calculate the magnitude of the acceleration (in m/s²) starting from rest if each dog exerts an average force of160N backward on the snow. B.) What is the magnitude of the acceleration (in m/s²) once the sled starts to move? C.) For both situations, calculate the magnitude of the force (in N) in the coupling between the dogs and the sled.

F_{part (a)}

F_{part (b)}