I'm a visual learning, can some one please work this out so I can see how you get the answer? Physics exam in two days!
The velocity v(t) of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/s2)t - (6.2 m/s3)t2. What is the average acceleration of the particle between t = 1.0 s and t = 2.0 s (up to two significant figures) ?

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\[Average acceleration=\frac{ Final velocity-initial velocity }{ time 2-time1 }\]

Just plug in the first time period to get your initial velocity.

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