The term that describes the rate at which something is able to move is:

• A. Speed
• B. Velocity
• C. Displacement
• D. Momentum

Answer: (A)

Describing how quickly an object moves focuses on the magnitude of motion. Speed is defined as distance traveled per unit time and is a scalar, meaning it has only magnitude. This makes speed the rate of motion. Velocity also describes rate but includes direction, so it’s the rate of change of position in a given direction. Displacement is just the straight‑line change in position, not a rate. Momentum is mass times velocity, describing how much motion the object has, not how fast it is moving. So speed best fits the description.