2. 1D Motion / Kinematics

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?

A ball is rolling at a speed of $0.25\frac{m}{s}$. What is its speed in miles per hour ($mph$)?

When you look at a car's speedometer while driving, does it display the average speed $v=\frac{d}{t}$ or the instantaneous speed $v=\frac{dx}{dt}$? What is the reason for your answer?

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?