1. The problem statement, all variables and given/known data A truck is pulling a car. is the magnitude of the force that the truck exerts on the car is the magnitude of the force that the car exerts on the truck Consider the following scenarios independently. 1. The truck is driving up a mountain with a constant velocity, neglecting friction. 2. The truck is speeding up while driving up a mountain, neglecting friction. 3.The truck is driving with a constant velocity, but as it turns out, the driver of the car left the emergency brake on. 2. Relevant equations F=ma 3. The attempt at a solution I know that the answer to all of the scenarios are FT = FC > 0 (the key for this past homework problem is available to me), but I trying to explain the concept to myself. The 3rd one is the hardest one for me. I suppose since the mass of the car and truck are not changing, that the truck must be moving at a faster speed to compensate for the emergency brake? Am I thinking about this correctly?