12 The graph below shows the velocity of an object moving in a straight line over a 20 second journey.
\includegraphics[max width=\textwidth, alt={}, center]{5e475c96-6bbb-44fb-a411-706dac20e2d6-17_579_1682_406_169}
12
- Find the maximum magnitude of the acceleration of the object.
12
- The object is at its starting position at times \(0 , t _ { 1 }\) and \(t _ { 2 }\) seconds.
Find \(t _ { 1 }\) and \(t _ { 2 }\)