2. 1D Motion / Kinematics

In the context of motion along a straight line, what does a negative $a$ indicate?

Which of the following represents a case in which you are not accelerating?

In a car, which control is primarily responsible for causing a change in velocity ($a$cceleration or $d$eceleration)?

How does air resistance affect the acceleration of objects as they fall toward the ground?

A hockey player of mass $m$ slides on rough ice and comes to a stop from an initial speed of $v_0$ over a distance $d$. What is the magnitude of her acceleration on the rough ice?

A large boulder falls from rest off a cliff. Assuming negligible air resistance and taking acceleration due to gravity as $g=9.8m/s^2$, how fast is the boulder moving after $10$ seconds?

A car initially at rest accelerates uniformly and reaches a speed of $20m/s$ in $5s$. What is the magnitude of the acceleration during this speeding up phase?

Which of the following best describes positive $a$?

Which statement about the acceleration of an object is correct?

When an object is speeding up to the right along a straight line, which of the following statements is true about the directions of its velocity $\mathbf{v}$ and acceleration $\mathbf{a}$ vectors?

Which of the following best describes the difference between acceleration and speed?

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?