Final answer:
Maya is incorrect because friction acts as an unbalanced force that will cause the car to decelerate and stop, contrary to the constant motion suggested by Newton's first law of motion without unbalanced forces.
Step-by-step explanation:
Maya is not correct in her thinking. When a toy car is on a ramp with friction, the force of friction opposes the motion of the car, causing it to eventually come to a stop. According to Newton's first law, an object in motion will stay in motion with the same speed and direction unless acted upon by a nonzero net force. In Maya's case, the friction force is the unbalanced force that will change the car's motion.
Therefore, even without any other unbalanced force applied, the friction on the ramp will cause the car to eventually decelerate and stop. Only if the ramp were frictionless, like Rose's ramp, would the car continue to travel at a constant velocity as long as no other unbalanced forces (like air resistance) are significant, upholding Newton's first law of motion.