Question

The graph represents velocity vs. time for Carla.

A graph with horizontal axis time (seconds) and vertical axis velocity (meters per second). A line runs in straight segments from 0 seconds 15 meters per second to 1 seconds 13 meters per second to 2 seconds 10 meters per second to 3 seconds 4 meters per second to 4 seconds 0 meters per second to 6 seconds 4 meters per second.

Which best describes the graph?

Carla sped up in the beginning of her trip, stopped, and then slowed down.
Carla had a greater acceleration in the beginning than in the end.
Carla slowed down in the beginning of her trip, stopped, and then sped up.
Carla had a continuous acceleration throughout the entire trip.

Answer 1

Carla slowed down in the beginning of her trip, stopped, and then sped up.

Explanation: velocity falls from 15 m/s to 0 m/s by t = 4 s (she slows to a stop) and then rises to 4 m/s by t = 6 s (she speeds up).