1. Acceleration involves a change in ____.

speed
velocity
displacement
direction

I think its b.

b is correct

You are correct! Acceleration involves a change in velocity. To understand this concept, let's break it down further.

Acceleration is defined as the rate of change of velocity. Velocity, on the other hand, involves both speed and direction. Speed refers to how fast an object is moving, while direction indicates the path that the object is taking.

When there is a change in speed or direction, or both, acceleration occurs. For example, if an object speeds up or slows down, it experiences acceleration. Similarly, if an object changes its direction, it also undergoes acceleration.

In this case, acceleration does not involve a change in displacement. Displacement refers to the overall change in position, which is a combination of both the magnitude and direction.

Therefore, the correct answer is b) velocity.