- Thread starter
- #1

#### karush

##### Well-known member

- Jan 31, 2012

- 2,928

from tikx package...

\begin{tikzpicture}

%\draw (0,5) -- (6,5);

\draw [thick] (0,1) -- (18/2,1);

\node at (0,.8){0};

\node at (18/2,.8){180};

%\draw (1,5)--(1,4)--(2,4);

%\node at (1.5,4.1) {v};

\draw[step=.45 cm,gray,very thin,dashed]

%(-6,0)

grid (18/2,8);

\end{tikzpicture}

At $t=0$ a car is stopped at a traffic light

When the light turns green, the car starts to speed up,

and gains speed at a constant rate until it reaches a speed of $2 m/s \, 8s$ after the light turns green.

The car continues at a constant speed for $60m$

Then the driver sees a read light up ahead at the next intersection, and starts slowing down at a constant rate.

The car stops at the red light, $180 m$ form where it was at $t=0$

a) Draw $x_t, v_t,$ and $a_t$ graphs for the motion of the car

b) In a motion diagram show the position, velocity and acceleration of the car.

ok Im tying to do this using tikx but got stuck at the begining

I currently have the x-axis at distance but maybe it shud be time

we might need actually 2 graphs

I think the velocity is really $2m/s$

$v = v_0 + at$

then

$\dfrac{v-v_0}{t}=a$

so

$\dfrac{2m/s}{s}=\dfrac{2m}{s^2}=a$

\begin{tikzpicture}

%\draw (0,5) -- (6,5);

\draw [thick] (0,1) -- (18/2,1);

\node at (0,.8){0};

\node at (18/2,.8){180};

%\draw (1,5)--(1,4)--(2,4);

%\node at (1.5,4.1) {v};

\draw[step=.45 cm,gray,very thin,dashed]

%(-6,0)

grid (18/2,8);

\end{tikzpicture}

At $t=0$ a car is stopped at a traffic light

When the light turns green, the car starts to speed up,

and gains speed at a constant rate until it reaches a speed of $2 m/s \, 8s$ after the light turns green.

The car continues at a constant speed for $60m$

Then the driver sees a read light up ahead at the next intersection, and starts slowing down at a constant rate.

The car stops at the red light, $180 m$ form where it was at $t=0$

a) Draw $x_t, v_t,$ and $a_t$ graphs for the motion of the car

b) In a motion diagram show the position, velocity and acceleration of the car.

ok Im tying to do this using tikx but got stuck at the begining

I currently have the x-axis at distance but maybe it shud be time

we might need actually 2 graphs

I think the velocity is really $2m/s$

$v = v_0 + at$

then

$\dfrac{v-v_0}{t}=a$

so

$\dfrac{2m/s}{s}=\dfrac{2m}{s^2}=a$

Last edited: