2. 1D Motion / Kinematics

If a car is moving at $v{c}_1$ and a bicycle is moving in the same direction at $v{b}_1$, what is the speed of the car relative to the speed of the bicycle?

Which of the following best describes the average velocity of an object over a time interval?

A car travels $10$ miles east in $30$ minutes. What is its average velocity in miles per hour?

A horse gallops in a straight line, covering a distance of $120m$ in the first $10s$. What is the horse's average velocity during this time interval?

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?

On an audio compact disc (CD), digital bits of information are encoded sequentially along a spiral path. Each bit occupies about 0.28 μm. A CD player's readout laser scans along the spiral's sequence of bits at a constant rate of about 1.2 m/s as the CD spins. Determine the number N of digital bits that a CD player reads every second.

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?