2. 1D Motion / Kinematics

When demonstrating the 2023 Leaf’s smooth acceleration, which of the following best describes the car’s acceleration if it increases its velocity uniformly from rest to $20m/s$ in $10s$?

Which of the following best describes $\mathrm{negative} \mathrm{acceleration}$?

As you accelerate upward in an elevator, what happens to your apparent weight as measured by a scale under your feet?

A test tube is placed in a centrifuge so that its end is $10cm$ from the axis of rotation. If the centrifuge rotates at a constant angular speed $$, what is the magnitude of the acceleration at the end of the test tube?

A small object moves along the x-axis with constant acceleration $a$. If its initial velocity is $v_0$ and its initial position is $x_0$, which equation gives its position $x$ at time $t$?

Which statement best describes the difference between $\mathrm{positive}$ and $\mathrm{negative}$ acceleration?

Which statement is true about $a:$ acceleration?

In a lab experiment, a cart is pushed by a variable number of identical fans. How will increasing the number of fans affect the cart's acceleration, assuming all other factors remain constant?

Which of the following best describes negative acceleration ($a<0$)?

A motorcycle moves along a straight road, and its velocity is recorded at each second as follows: at $1$ s, $0$ m/s; at $2$ s, $0$ m/s; at $3$ s, $2$ m/s; at $4$ s, $5$ m/s. At which second does the motorcycle first begin to have positive acceleration?

Which of the following examples accurately describes an object that is accelerating?

Which of the following is an example of acceleration?

Suppose an object is in free fall near Earth's surface and air resistance is negligible. Each second, the object falls:

An automobile is originally at rest at $s=0$. If it accelerates uniformly at $a=2m/s^2$, what is its position after $t=3s$?

A car's velocity changes from $10m/s$ to $8m/s$ in $5s$. What is the acceleration of the car?