2. 1D Motion / Kinematics

You walk to the right at 3m/s for 8s, then turn around and walk backwards at 2m/s for some unknown time. You end up 16m to the right from where you started. How long did you walk backwards?

Which of the following statements about average speed is correct?

Which of the following best explains how calculating average velocity can result in units of speed?

Which of the following best describes the rate at which an object is moving relative to a reference point?

A car travels at a constant speed of $20.0m/s$ for $30.0s$. What is the car's average velocity during this time interval?

Which statement best describes the difference between $v̄$ (average velocity) and $v$ (instantaneous velocity)?

Which of the following best describes the difference between instantaneous velocity and average velocity?

If a car travels a displacement of $120 m$ to the east in $10 s$, what is the car's average velocity?

An object moves with a constant average velocity of $4.5m/s$. How much time does it take to travel a distance of $65m$?

Which of the following best describes how to calculate the average acceleration of an object?

Which of the following is a unit of speed?

A plate moves $200m$ in $10s$. What is its average velocity?

What is the average velocity of an object that travels $42$ meters in $6$ seconds?

Which of the following best describes the difference between instantaneous speed and average speed?

An object moves in a straight line from position $x=2$ meters to $x=10$ meters in $4$ seconds. What is the average velocity of the object?