Problem about motion -- vertical projectile motion

[Keith Gellar]

"9. In Fig. 2-22, a cream tangerine is thrown directly upward past three evenly spaced windows of equal heights. Rank the windows according to (a) the average speed of the cream tangerine while passing them, (b) the time the cream tangerine takes to pass them, (c) the magnitude of the acceleration of the cream tangerine while passing them, and (d) the change v in the speed of the cream tangerine during the passage, greatest first." - Fundamentals of Physics, 10th edn, Halliday & Resnick, p. 32

With part (c) - initially I thought the upward acceleration would decrease as the tangerine goes past the windows because it is being acted upon by the force of gravity, but then I felt that the upward acceleration is not changing - it is fixed - and so is the downward acceleration due to gravity. But instead, the velocity is being changed.

Is that correct?

Thank-you! :)

 

[kuruman]

It looks like you are maybe confusing acceleration and velocity. What is the acceleration of an object in free fall? Your initial thought is incorrect. Your second thought is correct.

 

[Keith Gellar]

It looks like you are maybe confusing acceleration and velocity. What is the acceleration of an object in free fall? Your initial thought is incorrect. Your second thought is correct.

Hi Kuruman
Yes i realized that just now - silly me! Thank you for the answer.