Question

two cars are racing each other on the same straight road. they are right next to each other and are traveling at the same speed and direction. are the two cars moving relative to each other? * 1 point
○ yes
○ no

which word best describes an object that isn’t moving? * 1 point
○ position
○ relative
○ stationary
○ stuck

you are walking down a street. are you moving relative to a stoplight? * 1 point
○ yes
○ no

Explanation:

First Question:

To determine if two objects are moving relative to each other, we check their relative velocity. If two cars have the same speed and direction, their relative velocity is zero (since relative velocity \(v_{rel}=v_1 - v_2\), and \(v_1 = v_2\) here). So, they are not moving relative to each other.

• "position" refers to a location, not the state of motion.
• "relative" is about comparison, not describing non - motion.
• "stationary" means not moving or at rest.
• "stuck" implies being unable to move due to an external force, not just the state of non - motion. So "stationary" is the correct term.

When you walk down a street, your position relative to the stoplight changes over time. Since relative motion depends on the change in position between two objects, you are moving relative to the stoplight.

Answer:

no

Second Question: