A car begins from rest at time (t=0 ), and then accelerates along a straight track during the interval (0

Step-by-step solution

- From the graph, for (0 t 2 s, v=2 t² a=d v / d t=4 t ). - The coin begins to slip at (t=1 ~s ), so limiting static friction provides the needed acceleration then: ( a (1)=4 ~m / s ²= s g s =4 / 10=0.4 ).