2. 1D Motion / Kinematics

The average acceleration vector must point in the same direction as which of the following vectors?

When an object speeds up in the direction of its velocity ($v$), what type of acceleration does it experience?

A car traveling at an initial velocity of $v=20m/s$ comes to a stop in $t=4s$ after the brakes are applied. What is the magnitude of the car's acceleration $a_x$ during this time?

If blood is accelerated from rest to a speed of $30.0cm/s$ in $0.200s$, what is the magnitude of its acceleration?

Which of the following best describes the physical quantity defined as the rate at which velocity changes with respect to time? (i.e., $\frac{\partial v}{\partial t}$)

If an object starts from rest and moves with constant acceleration $a$, what is its velocity $v$ after time $t$?

A truck increases its velocity from $10m/s$ to $30m/s$ in $5s$. What is the acceleration of the truck?

A plane starts from rest and accelerates uniformly at acceleration $a$. What is the distance $d_{first1}$ traveled by the plane in the first second of its run?

A particle moves along a straight line so that its velocity as a function of time is given by $v=3.0t+2.0$, where $v$ is in meters per second and $t$ is in seconds. What is the instantaneous acceleration $a$ of the particle at $t=45.0$ s?

If an object's velocity as a function of time is given by $v=3t-2$ (in $m/s$), the acceleration of the object at time $t=0.7$ $s$ is most nearly equal to which of the following?

If the $v$ is changing over time but in a constant and predictable way, then __________.

What happens to the motion of an object when its velocity is $v>0$ and its acceleration is $a<0$?

Which of the following best describes the difference between $\mathrm{speed}$ and $\mathrm{acceleration}$?