How many goals of acceleration are described?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

Acceleration involves two aspects: changing the speed (tangential) and changing the direction of motion (centripetal/ radial). If the material describes both a change in how fast something is going and a change in the path’s direction, that yields two goals or components of acceleration. Understanding this helps: when speed changes along a straight line, only the tangential part matters; when moving in a circle at constant speed, only the centripetal part matters; and when both occur, both components are present. That’s why two goals of acceleration are described.