Acceleration-Time Graph

  • Thread starter roam
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  • #1
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Homework Statement



(a) What does the area under the acceleration-time graph represent? (Hint: it is NOT velocity or speed).

(b) What is a particle doing when the graph is above or below the axis? (Hint: a graph below the axis does NOT necessarily mean deceleration).

The Attempt at a Solution



Can someone explain these two for me, I am very confused.
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
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The area under the acceleration-time graph = a*Δt = ........?
 
  • #3
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The area under the acceleration-time graph = a*Δt = ........?

v? but the questions says "it is NOT velocity or speed"! :confused:
 
  • #4
The area under the acceleration time graph along a given time interval is the change in velocity along that interval, and a negative acceleration means that the particle's velocity becomes more negative. Negative acceleration may not necessarily be deceleration, since the particle's velocity could be in the negative direction itself, thus a negative acceleration speeds up the particle! A positive acceleration just means that the particle's velocity becomes more positive with respect to time
 

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