Question

marisol is sitting in a bus that is passing a stationary traffic light. which of the following statements correctly describes marisols motion?

marisol is moving relative to both the traffic light and to the bus driver.
marisol is not moving relative to either the traffic light or the bus driver.
marisol is moving relative to the traffic lights but not moving relative to the bus driver.
marisol is moving relative to the bus driver but not moving relative to the light.

Explanation:

Relative motion depends on the reference frame. The traffic light is stationary (assuming the ground - based reference). The bus is moving. For the traffic light (ground - based reference), Marisol (in the moving bus) is moving. For the bus driver (who is in the same frame of reference as Marisol, i.e., the moving bus), Marisol is not moving (since there is no change in position between Marisol and the bus driver).

Answer:

Marisol is moving relative to the traffic lights but not moving relative to the bus driver.