Final answer:
The object that will NOT have acceleration is C) A man walking on a straight path, assuming he maintains a constant speed with no change in direction.
Step-by-step explanation:
This asks which of the following will NOT have acceleration: A) A Chair on a Ferris wheel B) A girl riding a roller coaster C) A man walking on a straight path D) A skater roller skating at a roller rink. Acceleration is defined as a change in velocity, which can involve a change in speed, a change in direction, or both. Therefore: A chair on a Ferris wheel is constantly changing direction as it moves in a circular path, so it is accelerating. A girl riding a roller coaster changes speed and direction frequently, so she is also accelerating. A skater roller skating may change speed and direction, implying acceleration. Thus, the correct answer is C) A man walking on a straight path, is assumed to be walking at a constant speed; if his speed and direction do not change, he will not have acceleration.