If you represent velocity with an arrow.the length of the arrow represents a distance. b acceleration. c speed. d direction.

## Step 1<br />In physics, velocity is a vector quantity. This means it has both magnitude and direction. The magnitude of velocity is represented by the length of the arrow, while the direction is represented by the direction of the arrow.<br /><br />## Step 2<br />The length of the arrow does not represent distance, acceleration, or speed. These are different concepts in physics.<br /><br />## Step 3<br />Distance is a scalar quantity, meaning it only has magnitude and no direction. It is the total length of the path traveled by an object, regardless of the direction.<br /><br />## Step 4<br />Acceleration is a vector quantity that represents the rate of change of velocity. It is not represented by the length of the arrow.<br /><br />## Step 5<br />Speed is a scalar quantity that represents the rate of change of distance. It is not represented by the length of the arrow.<br /><br />## Step 6<br />Therefore, the length of the arrow in a velocity vector represents the direction of the velocity.