(b)The graph of versus tis given in Figure 2.23. Figure 2.23Reflect:The acceleration is constant when the velocity changes at a constant rate. When the velocity is constant, theacceleration is zero.2.24. Set Up:Solve: (a)and (b)and (c)(d)2.25. Set Up:The acceleration equals the slope of the versus tcurve.Solve:The qualitative graphs of acceleration as a function of time are given in Figure 2.25.Figure 2.25The acceleration can be described as follows:(a)positive and constant,(b)positive and increasing,(c)negative andconstant,(d)positive and decreasing.Reflect:When and have the same sign then the speed is increasing. In (c) the velocity and acceleration have
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