2. 1D Motion / Kinematics

If you are traveling at $35\text{ mph}$ and then slow down to $15\text{ mph}$ over a distance of $0.5\text{ miles}$ as you enter a school zone, what is your average velocity during this interval?

A car travels a distance of $150km$ in $7200s$ at constant speed. What is the speed of the car in $m/s$?

Which of the following best defines $v̅$ (average velocity)?

Which of the following correctly describes how speed is calculated?

Which of the following best describes the difference between average velocity and average speed for an object moving along a straight line?

If you move $50$ meters in $10$ seconds, what is your average velocity assuming you travel in a straight line in the positive direction?

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

Raul biked at a steady speed of $12 \mathrm{km}/h$ for $3$ hours. What was his average velocity during this time?

Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 40 mph and half the distance at 60 mph. On her return trip, she drives half the time at 40 mph and half the time at 60 mph. What is Julie's average speed on the way to Grandmother's house?

Which two physical quantities are combined to define $v$ (velocity)?

Which of the following best describes what $speed$ measures?

Which of the following factors applies to $v$ (velocity) but not to $s$ (speed)?

A cross-country skier completes a $7.5$ km race in $45$ minutes. What is the skier's average speed in $\text{km}/\text{h}$?

A particle moves in a straight line such that its velocity changes from $0$ to $40.0m/s$ in the first $20.0s$. What is the average acceleration $a_{\mathrm{av}}$ of the particle over this time interval?

Which of the following is the main difference between speed and velocity?