Question 1

In a situation where an object can move only along the $x$ axis, a book states "the force on the object is $\mathrm{F}=$ $k x$, where $k$ is a constant, and $x$ is the object's position coordinate." Is $F$ being used here as a shorthand symbol for $|\vec{F}|(A)$ or $F_{x}(C)$ ?
$\bullet$ A
$\bullet$ C

Accepted Answer

The answer of In a situation where an object can...

Question 2

In a situation where an object can move only along the $x$ axis, you see this statement in a book: "The object's velocity is $\mathrm{v}=\left(x-x_{0}\right) / t$, where $x$ is the object's position at time $t$ to the left or right of its position $x_{0}$ at time $t=0$." Is $v$ being used here as a shorthand for $|\vec{v}|(\mathrm{A})$ or $v_{x}(\mathrm{C})$ ?
$\bullet$ A
$\bullet$ C

Accepted Answer

The answer of In a situation where an object can...

Question 3

Which of the following things is an "extended object"? For each item, answer "A" if the item is an acceptable extended object, " $\mathrm{B}$ " if the definition of an extended object applies badly to the item, and " $\mathrm{D}$ " if it is debatable.
-An electron

Accepted Answer