Spacecraft X has twice the mass of Spacecraft Y. They orbit Earth at the same radius. Which of these must be true? A. X feels a greater gravitational force than Y B. X travels twice as fast as Y C. X takes twice as long to complete an orbit D. The orbital period of X is the same as Y

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.