Question

speed, velocity & acceleration
motion tutorial: speed, velocity & acceleration
frame of reference
what you are comparing a moving object against
moving to the right compared to the ground
multiple - choice question
what is a frame of reference?
a non - moving object used to compare motion against
a moving object used to compare motion against

Explanation:

A frame of reference is a point or object used as a basis for comparison to determine if something is in motion. It can be either moving or non - moving. For example, when we say a car is moving, we might be using the non - moving ground as a frame of reference. But in some cases, like when two cars are moving on a highway, one car can be used as a moving frame of reference to describe the motion of the other.

Answer:

A. A non - moving object used to compare motion against
B. A moving object used to compare motion against