2. 1D Motion / Kinematics

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 $\mathrm{acceleration}$?

Which of the following objects has zero $a$?

In which of the following situations will a ball experience the greatest $a$?

Now consider the children's linear accelerations. Which of the following statements is correct?

Which of the following best describes how motion maps illustrate accelerated motion?

If your car is accelerating to the right from a stop, which of the following statements is true about the direction of its acceleration vector?

Which of the following best describes $a$cceleration in physics?

Which of the following factors directly affect an individual's total stopping time when bringing a moving vehicle to rest?

If $v$ is constant, what is the $a$ of the object?

A cart moves along a straight track with a low fan speed, resulting in a constant acceleration. If the cart's velocity increases from $10 \text{cm}/\text{s}$ to $30 \text{cm}/\text{s}$ in $4 \text{s}$, what is the acceleration of the cart in $\text{cm}/\text{s}{2}^{}$?