## Physics: Principles with Applications (7th Edition)

a. $t \approx 49 s$ b. t = 88s to t = 108s c. 0s-44s, 55s-82s, and 88s-108s d. 55s-82s
You may obtain slightly different answers depending on how you read the graph. a. The greatest velocity is at the highest point on the graph. This happens at $t \approx 49 s$. b. Periods of constant velocity, on a velocity-time graph, are indicated by horizontal segments (acceleration of 0, i.e., slope of zero). This occurs once, from t = 88s to t = 108s. c. Periods of constant acceleration on a velocity-time graph are indicated by constant slope. This happens 3 times: from 0s-44s, 55s-82s, and from 88s-108s. d. The magnitude of the acceleration is greatest on a v-t graph when the magnitude of the slope is the greatest. This occurs from 55s-82s.