Position-Time Graphs & Velocity Video Lessons

Concept

Problem: The motions described in each of the questions take place at an intersection on a two-lane road with a stop sign in each direction. For each motion, select the correct position versus time graph. For all of the motions, the stop sign is at the position x = 0, and east is the positive x-direction. (Figure 1)Part A. A driver, traveling west, slows and stops at the stop sign.Part B. A driver, after stopping at the stop sign, accelerates to the east.

FREE Expert Solution

Part A

For a driver travelling to the west and stops at the sign, the slope must be negative.

The curve also needs to start at positive x-axis and then becomes zero at point x = 0, implying that the driver is traveling towards the west and has stopped at the stop sign.

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Problem Details

The motions described in each of the questions take place at an intersection on a two-lane road with a stop sign in each direction. For each motion, select the correct position versus time graph. For all of the motions, the stop sign is at the position x = 0, and east is the positive x-direction. (Figure 1)

Part A. A driver, traveling west, slows and stops at the stop sign.

Part B. A driver, after stopping at the stop sign, accelerates to the east.