When a train car traveling at 4 m/s collides with a stationary train car, what happens to the momentum of the first train car? A. The first train car stops and the second train car stops.
B. The momentum is split between both train cars.
C. The first train car stops and the second train car moves then stops.
D. The first train car stops and its momentum is transferred to the second train car.

Which principle states: "geologic processes taking place on earth today operated similarly in the past and can be used to explain past geologic events"? a. lateral continuity

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

The relationship of both of them

Answer choice a test prep