2. 1D Motion / Kinematics

A car travels in a straight line east, changing its speed at different times. Is it possible for the car to have an acceleration directed $\mathrm{west}$ during this motion?

Which of the following best describes the physical quantity defined as the rate at which $v$ changes over $t$?

When an object is released with an initial velocity upward near $E{a}^{r}th$'s surface, in what direction does it accelerate?

A pike accelerates from rest to a speed of $8m/s$ in $0.4s$ during a strike. What is the acceleration of the pike during this strike?

What is the acceleration of a car that maintains a constant velocity of $100km/h$ for $10s$?

Why is slowing down considered $acceleration$ in physics?

Which of the following is the cause of an acceleration?

A rocket sled accelerates from $10\text{m/s}$ to $50\text{m/s}$ in $2\text{s}$. What is the acceleration of the sled?

Given a motion diagram showing an object speeding up in a straight line, which of the following correctly shows the $a$ vectors added to the diagram?

A car moving south speeds up from $10\text{m/s}$ to $40\text{m/s}$ in $15\text{s}$. What is the car's acceleration?

The $2 \mathrm{second}$ rule applies to vehicles traveling under which of the following conditions?

A car maintains a constant velocity of $120\mathrm{km}/h$ for $10s$. What is the acceleration of the car during this time?