Which statement about relative motion is not true? A. A seated passenger on a plane is motionless relative to the plane.
B. A flight attendant walking down the aisle is in motion relative to the plane/
C. A plane appears motionless to a skydiver who jumps out of it.
D. The plan appears to be moving across the sky relative to a person watching from the ground.

Explanation:

laws of physics which apply when you are at rest on the earth also apply when you are in any reference frame which is moving at a constant velocity with respect to the earth. For example, you can toss and catch a ball in a moving bus if the motion is in a straight line at constant speed.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds