Motion on Incline Problem: Find 1st Mark in 2.5s

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A ball rolling down an inclined plane accelerates, which affects the distances marked at intervals. The second mark is 1.5m from the start after 2.5 seconds, indicating that the ball's velocity is not constant. Calculating the first mark requires understanding the acceleration, as the ball's speed increases over time. The discussion highlights the importance of using kinematic equations to find the distances at each time interval. Correctly applying these principles will lead to accurate positions for both the first and fourth marks.
Cole07
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problem: A ball is allowed to roll from rest down an inclined plane, and the distances are marked every 2.5s. if the second mark is made 1.5m from the starting point, where is the first mark?

where is the fourth mark?

well i made a velocity vs. t chart and the velocity of it is 0.6 then ifound the velocity of ech number on my graph but iwas told my answer was wrong. can you help me please.
 
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well the ball is going to accelerate as it rolls down the plane. it sounds like ur assumin the velocity stays the same
 
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