Lesson: Relative Motion High School PhysicsPhysics
In this lesson, we will learn how to define the positions, displacements, and velocities of objects compared with those of other objects.
Sample Question Videos
The points a, b, c, d, and e are shown in the diagram.
How far north of a is c?
How far west of a is b?
How far south of a is e?
How far east of a is d?
How far north of e is c?
How far south of e is d?
How far east of d is b?
How far west of b is c?
An airplane flying horizontally in a straight line moves parallel to the ground at a speed of 450 m/s. A second airplane flies below, in the opposite horizontal direction, moving parallel to the ground at a speed of 100 m/s. Which of the diagrams (a), (b), (c), and (d) correctly shows how the velocities of the airplanes can be combined to find the speed at which the airplanes move relative to each other?
Three walkers stand at the positions , , and shown in the diagram. The walkers all have heights of 1.75 m. The walker at position picks up a stone from the ground and throws it vertically upward to a maximum height that is 7.25 m above her head.
How far above the head of the walker at position is the stone when it is at its maximum height?
How far below the feet of the walker at position is the stone when it is at its maximum height?