Menu div.question,div.steps {font-size: 16px; padding: 10px;line-height: 20px; margin: 20px;} div.question{border: 1px solid #ccc;} div#solution .button{font-size: 20px; margin: 20px; width: 200px; padding: 10px; text-align: center;} div.hint,div.answer,div.steps{display: none;} div.pre_next{font-size: 30px; width:90%; margin:auto;} div.pre_next a.nav_pre{float:left;} div.pre_next a.nav_next{float:right;} div.title div.notes{ font-family:sans-serif, Arial; font-size: 18px; } 2. A velocity–time graph for an object moving along the x axis is shown in Figure P2.13. (a) Plot a graph of the acceleration versus time. Determine the average acceleration of the object (b) in the time interval t=5.00s to t=15.0s and (c) in the time interval t = 0 to t = 20.0 s. Hint a = (∆v)/(∆t) Answer (a) see graph (b) 1.6 m//s^2 (c) 0.8 m//s^2 Show Steps (a) See graph. (b) ∆v = v_f- v_i = 8 m//s -(-8 m//s) = 16 m//s ∆t = (t_f - t_i) = 15 s - 5s = 10 s a = (∆v)/(∆t) = (16 m//s) / (10 s) = color(red)(1.6 m//s^2)  (c) ∆v = v_f- v_i = 8 m//s -(-8 m//s) = 16 m//s ∆t = (t_f - t_i) = 20 s - 0s = 10 s a = (∆v)/(∆t) = (16 m//s) / (20 s) = color(red)(0.8 m//s^2)