2. 1D Motion / Kinematics

In the context of one-dimensional motion, at what point during its motion is an object's $a$ (acceleration) equal to $0$?

What is the acceleration of a car that travels in a straight line at a constant speed ($v=ext\{const\}$)?

When a car turns right and accelerates to $30 \mathrm{mph}$ from rest, approximately how much time does it typically take under normal driving conditions?

A rock with mass $3kg$ is thrown with a net force of $18N$. What is the acceleration of the rock?

Which of the following equations can be used to solve for $a$?

Suppose an object moves in a straight line and its velocity versus time graph is a straight line with a constant positive slope. During what period is the $a$cceleration constant?

If an object has a $a<0$ (negative acceleration), which of the following best describes its motion?

In the context of introductory physics, acceleration depends on which two quantities?

If a car on a frictionless track is pulled by a string with two washers attached (each washer providing the same force $F$), how does the acceleration $a$ of the car compare to when only one washer is used?

A girl pulls on a $10\mathrm{kg}$ wagon with a constant force of $20N$. What is the wagon's acceleration?

If an object's mass $m$ decreases while a constant force $F$ acts on it, the acceleration $a$:

Under which of the following conditions is acceleration considered $\mathrm{negative}$?

A motorcycle moves along a straight road. Its velocity at each second is recorded as follows: at $t=0s$, $v=0m/s$; at $t=1s$, $v=2m/s$; at $t=2s$, $v=4m/s$; at $t=3s$, $v=4m/s$; at $t=4s$, $v=6m/s$. At which second does the motorcycle first start to have positive acceleration?

Which of the following objects has zero $a$?