2. 1D Motion / Kinematics

When an object's velocity is positive ($v>0$) and its acceleration is negative (), what happens to the object's motion?

A flea jumps vertically by rapidly extending its legs and reaches a velocity of $3.2m/s$ in $0.001s$. What is the flea's acceleration as it extends its legs?

Which of the following best describes a measure of change in velocity $\frac{\Delta v}{\Delta t}$ over a measure of time?

Which formula is used to find an object's $\mathrm{acceleration}$?

Which two factors directly affect the acceleration of an object according to Newton's second law of motion ($F=ma$)?

Which car is accelerating?$a$

Which of the following scenarios involves $a$cceleration?

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?