Slightly complicated free body diagram

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I would like to use tikz to draw the following drawing
enter image description here

I am brand new to tikz. My first trial is

begintikzpicture[>=Latex]

 draw[thick] (0,0) rectangle (10mm,10mm);
node at (0.5,0.5) $M_1$;
 draw[thick,->](0.5,0)--(0.5,-1)node[below]$M_1g$;
 draw[thick,->](0.5,1)--(0.5,2)node[above]$T_1$;
 draw[thick,->](1,0.5)--(2,0.5)node[right]$N_31$;

draw[thick] (2,0) rectangle (10mm,10mm);
node at (4.5,0.5) $M_1$;
 draw[thick,->](4.5,0)--(4.5,-1)node[below]$M_1g$;
 draw[thick,->](4.5,1)--(4.5,2)node[above]$T_1$;
 draw[thick,->](4,0.5)--(3,0.5)node[above]$N_31$;
endtikzpicture

which draws the first two rectangles. However the second rectangle is drawn next to the first (no space like the space between the M1,M2 rectangles).
I am also not sure how to build the circle in M3. Any pointers would be appreciated.

asked 1 hour ago

JennyToy

1183

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up vote
3
down vote

favorite

I would like to use tikz to draw the following drawing
enter image description here

I am brand new to tikz. My first trial is

begintikzpicture[>=Latex]

 draw[thick] (0,0) rectangle (10mm,10mm);
node at (0.5,0.5) $M_1$;
 draw[thick,->](0.5,0)--(0.5,-1)node[below]$M_1g$;
 draw[thick,->](0.5,1)--(0.5,2)node[above]$T_1$;
 draw[thick,->](1,0.5)--(2,0.5)node[right]$N_31$;

draw[thick] (2,0) rectangle (10mm,10mm);
node at (4.5,0.5) $M_1$;
 draw[thick,->](4.5,0)--(4.5,-1)node[below]$M_1g$;
 draw[thick,->](4.5,1)--(4.5,2)node[above]$T_1$;
 draw[thick,->](4,0.5)--(3,0.5)node[above]$N_31$;
endtikzpicture

asked 1 hour ago

JennyToy

1183

New contributor

add a commentÂ |Â

up vote
3
down vote

favorite

I would like to use tikz to draw the following drawing
enter image description here

I am brand new to tikz. My first trial is

begintikzpicture[>=Latex]

 draw[thick] (0,0) rectangle (10mm,10mm);
node at (0.5,0.5) $M_1$;
 draw[thick,->](0.5,0)--(0.5,-1)node[below]$M_1g$;
 draw[thick,->](0.5,1)--(0.5,2)node[above]$T_1$;
 draw[thick,->](1,0.5)--(2,0.5)node[right]$N_31$;

draw[thick] (2,0) rectangle (10mm,10mm);
node at (4.5,0.5) $M_1$;
 draw[thick,->](4.5,0)--(4.5,-1)node[below]$M_1g$;
 draw[thick,->](4.5,1)--(4.5,2)node[above]$T_1$;
 draw[thick,->](4,0.5)--(3,0.5)node[above]$N_31$;
endtikzpicture

asked 1 hour ago

JennyToy

1183

New contributor

I would like to use tikz to draw the following drawing
enter image description here

I am brand new to tikz. My first trial is

begintikzpicture[>=Latex]

 draw[thick] (0,0) rectangle (10mm,10mm);
node at (0.5,0.5) $M_1$;
 draw[thick,->](0.5,0)--(0.5,-1)node[below]$M_1g$;
 draw[thick,->](0.5,1)--(0.5,2)node[above]$T_1$;
 draw[thick,->](1,0.5)--(2,0.5)node[right]$N_31$;

draw[thick] (2,0) rectangle (10mm,10mm);
node at (4.5,0.5) $M_1$;
 draw[thick,->](4.5,0)--(4.5,-1)node[below]$M_1g$;
 draw[thick,->](4.5,1)--(4.5,2)node[above]$T_1$;
 draw[thick,->](4,0.5)--(3,0.5)node[above]$N_31$;
endtikzpicture

tikz-pgf

asked 1 hour ago

JennyToy

1183

New contributor

asked 1 hour ago

JennyToy

1183

New contributor

asked 1 hour ago

JennyToy

1183

New contributor

asked 1 hour ago

JennyToy

1183

asked 1 hour ago

JennyToy

1183

New contributor

JennyToy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

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Welcome to TeX.SE! I think that one of the greatest advantages of TikZ is that you can do almost everything with relative coordinates. This is illustrated by the following MWE, in which no object is positioned at an absolute coordinate (except for the very first box).

documentclass[tikz,border=3.14mm]standalone
usetikzlibrarypositioning,arrows.meta,angles,quotes
begindocument
begintikzpicture[>=Latex,Box/.style=draw,thick,minimum width=10mm,minimum
height=10mm]
 % first box
 node[Box] (M1)$M_1$;
 draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;
 draw[thick,->](M1.north) -- ++(0,0.5) node[above]$T_1$;
 draw[thick,->](M1.east) -- ++(0.5,0) node[right] (N31)$N_31$;
 % second box
 node[Box,right=1mm of N31] (M2)$M_2$;
 draw[thick,->](M2.south) -- ++(0,-0.5) node[below]$M_2g$;
 draw[thick,->](M2.north) -- ++(0,0.5) node[above]$N_32$;
 draw[thick,->](M2.east) -- ++(0.5,0) node[right] (T1)$T_1$;
 % third box
 node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$;
 draw[thick,->](M3.north) -- ++(0,0.5) node[above]$N_3$;
 draw[thick](M3.north east) -- ++(0.3,0.3) node[circle,draw,minimum
 size=3mm,fill=white] (Circ);
 draw[thick,->] (Circ.north) -- ++(-0.5,0) node[left]$T_1$;
 draw[thick,->] (Circ.east) -- ++(0,-0.5) node[below]$T_1$;
 draw[thick,->]([xshift=-4mm]M3.south) -- ++(0,-0.5) node[below]$M_3g$;
 draw[thick,->]([xshift=4mm]M3.south) -- ++(0,-0.5) node[below]$N_23$;
 % fourth box
 node[Box,right=1.5cm of M3,minimum size=1.5cm] (M4)$M_4$;
 draw[thick,->](M4.south) -- ++(0,-0.5) node[below]$M_4g$;
 draw[thick,->](M4.north) -- ++(0,0.5) node[above]$N_4$;
 draw[dashed]([yshift=-3mm]M4.north east) coordinate (aux1) -- ++(0.7,0) coordinate (aux2);
 draw[thick,->] (aux1) -- ++ (0.7,-0.7) coordinate (aux3) node[below]$T_2$;
 draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] 
 angle = aux3--aux1--aux2;
endtikzpicture
enddocument

enter image description here

Let me try to explain a bit what's going on here.

The positioning library is used to position objects (nodes) relative to each other. For instance, node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$; says that the box M3 should be 2cm right of M2. This has the big advantage that if you decide that the distance between M2 and M3 is to be increased, you only increase 1.5cm and everything else will move automatically. No need to adjust tons of coordinates.

As you see, I use nodes to draw these boxes. Apart from the fact that I do not have to draw the rectangles around the text, I can used the anchors of the node(s) to draw other elements like draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;. Here, I draw an arrow from the middle of the lower boundary, i.e. the south anchor, 0.5cm into the negative y direction and add a node below.

This also helps to draw the circle, where I just attach the arrows to the north and east anchors.

TikZ also has a library that allows one to draw and annotate angles, which is illustrated in draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] angle = aux3--aux1--aux2;.

edited 1 hour ago

answered 1 hour ago

marmot

60.6k464132

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documentclass[tikz,border=3.14mm]standalone
usetikzlibrarypositioning,arrows.meta,angles,quotes
begindocument
begintikzpicture[>=Latex,Box/.style=draw,thick,minimum width=10mm,minimum
height=10mm]
 % first box
 node[Box] (M1)$M_1$;
 draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;
 draw[thick,->](M1.north) -- ++(0,0.5) node[above]$T_1$;
 draw[thick,->](M1.east) -- ++(0.5,0) node[right] (N31)$N_31$;
 % second box
 node[Box,right=1mm of N31] (M2)$M_2$;
 draw[thick,->](M2.south) -- ++(0,-0.5) node[below]$M_2g$;
 draw[thick,->](M2.north) -- ++(0,0.5) node[above]$N_32$;
 draw[thick,->](M2.east) -- ++(0.5,0) node[right] (T1)$T_1$;
 % third box
 node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$;
 draw[thick,->](M3.north) -- ++(0,0.5) node[above]$N_3$;
 draw[thick](M3.north east) -- ++(0.3,0.3) node[circle,draw,minimum
 size=3mm,fill=white] (Circ);
 draw[thick,->] (Circ.north) -- ++(-0.5,0) node[left]$T_1$;
 draw[thick,->] (Circ.east) -- ++(0,-0.5) node[below]$T_1$;
 draw[thick,->]([xshift=-4mm]M3.south) -- ++(0,-0.5) node[below]$M_3g$;
 draw[thick,->]([xshift=4mm]M3.south) -- ++(0,-0.5) node[below]$N_23$;
 % fourth box
 node[Box,right=1.5cm of M3,minimum size=1.5cm] (M4)$M_4$;
 draw[thick,->](M4.south) -- ++(0,-0.5) node[below]$M_4g$;
 draw[thick,->](M4.north) -- ++(0,0.5) node[above]$N_4$;
 draw[dashed]([yshift=-3mm]M4.north east) coordinate (aux1) -- ++(0.7,0) coordinate (aux2);
 draw[thick,->] (aux1) -- ++ (0.7,-0.7) coordinate (aux3) node[below]$T_2$;
 draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] 
 angle = aux3--aux1--aux2;
endtikzpicture
enddocument

enter image description here

Let me try to explain a bit what's going on here.

The positioning library is used to position objects (nodes) relative to each other. For instance, node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$; says that the box M3 should be 2cm right of M2. This has the big advantage that if you decide that the distance between M2 and M3 is to be increased, you only increase 1.5cm and everything else will move automatically. No need to adjust tons of coordinates.

As you see, I use nodes to draw these boxes. Apart from the fact that I do not have to draw the rectangles around the text, I can used the anchors of the node(s) to draw other elements like draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;. Here, I draw an arrow from the middle of the lower boundary, i.e. the south anchor, 0.5cm into the negative y direction and add a node below.

This also helps to draw the circle, where I just attach the arrows to the north and east anchors.

TikZ also has a library that allows one to draw and annotate angles, which is illustrated in draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] angle = aux3--aux1--aux2;.

edited 1 hour ago

answered 1 hour ago

marmot

60.6k464132

add a commentÂ |Â

up vote
4
down vote

accepted

documentclass[tikz,border=3.14mm]standalone
usetikzlibrarypositioning,arrows.meta,angles,quotes
begindocument
begintikzpicture[>=Latex,Box/.style=draw,thick,minimum width=10mm,minimum
height=10mm]
 % first box
 node[Box] (M1)$M_1$;
 draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;
 draw[thick,->](M1.north) -- ++(0,0.5) node[above]$T_1$;
 draw[thick,->](M1.east) -- ++(0.5,0) node[right] (N31)$N_31$;
 % second box
 node[Box,right=1mm of N31] (M2)$M_2$;
 draw[thick,->](M2.south) -- ++(0,-0.5) node[below]$M_2g$;
 draw[thick,->](M2.north) -- ++(0,0.5) node[above]$N_32$;
 draw[thick,->](M2.east) -- ++(0.5,0) node[right] (T1)$T_1$;
 % third box
 node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$;
 draw[thick,->](M3.north) -- ++(0,0.5) node[above]$N_3$;
 draw[thick](M3.north east) -- ++(0.3,0.3) node[circle,draw,minimum
 size=3mm,fill=white] (Circ);
 draw[thick,->] (Circ.north) -- ++(-0.5,0) node[left]$T_1$;
 draw[thick,->] (Circ.east) -- ++(0,-0.5) node[below]$T_1$;
 draw[thick,->]([xshift=-4mm]M3.south) -- ++(0,-0.5) node[below]$M_3g$;
 draw[thick,->]([xshift=4mm]M3.south) -- ++(0,-0.5) node[below]$N_23$;
 % fourth box
 node[Box,right=1.5cm of M3,minimum size=1.5cm] (M4)$M_4$;
 draw[thick,->](M4.south) -- ++(0,-0.5) node[below]$M_4g$;
 draw[thick,->](M4.north) -- ++(0,0.5) node[above]$N_4$;
 draw[dashed]([yshift=-3mm]M4.north east) coordinate (aux1) -- ++(0.7,0) coordinate (aux2);
 draw[thick,->] (aux1) -- ++ (0.7,-0.7) coordinate (aux3) node[below]$T_2$;
 draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] 
 angle = aux3--aux1--aux2;
endtikzpicture
enddocument

enter image description here

Let me try to explain a bit what's going on here.

The positioning library is used to position objects (nodes) relative to each other. For instance, node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$; says that the box M3 should be 2cm right of M2. This has the big advantage that if you decide that the distance between M2 and M3 is to be increased, you only increase 1.5cm and everything else will move automatically. No need to adjust tons of coordinates.

As you see, I use nodes to draw these boxes. Apart from the fact that I do not have to draw the rectangles around the text, I can used the anchors of the node(s) to draw other elements like draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;. Here, I draw an arrow from the middle of the lower boundary, i.e. the south anchor, 0.5cm into the negative y direction and add a node below.

This also helps to draw the circle, where I just attach the arrows to the north and east anchors.

TikZ also has a library that allows one to draw and annotate angles, which is illustrated in draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] angle = aux3--aux1--aux2;.

edited 1 hour ago

answered 1 hour ago

marmot

60.6k464132

add a commentÂ |Â

up vote
4
down vote

accepted

documentclass[tikz,border=3.14mm]standalone
usetikzlibrarypositioning,arrows.meta,angles,quotes
begindocument
begintikzpicture[>=Latex,Box/.style=draw,thick,minimum width=10mm,minimum
height=10mm]
 % first box
 node[Box] (M1)$M_1$;
 draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;
 draw[thick,->](M1.north) -- ++(0,0.5) node[above]$T_1$;
 draw[thick,->](M1.east) -- ++(0.5,0) node[right] (N31)$N_31$;
 % second box
 node[Box,right=1mm of N31] (M2)$M_2$;
 draw[thick,->](M2.south) -- ++(0,-0.5) node[below]$M_2g$;
 draw[thick,->](M2.north) -- ++(0,0.5) node[above]$N_32$;
 draw[thick,->](M2.east) -- ++(0.5,0) node[right] (T1)$T_1$;
 % third box
 node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$;
 draw[thick,->](M3.north) -- ++(0,0.5) node[above]$N_3$;
 draw[thick](M3.north east) -- ++(0.3,0.3) node[circle,draw,minimum
 size=3mm,fill=white] (Circ);
 draw[thick,->] (Circ.north) -- ++(-0.5,0) node[left]$T_1$;
 draw[thick,->] (Circ.east) -- ++(0,-0.5) node[below]$T_1$;
 draw[thick,->]([xshift=-4mm]M3.south) -- ++(0,-0.5) node[below]$M_3g$;
 draw[thick,->]([xshift=4mm]M3.south) -- ++(0,-0.5) node[below]$N_23$;
 % fourth box
 node[Box,right=1.5cm of M3,minimum size=1.5cm] (M4)$M_4$;
 draw[thick,->](M4.south) -- ++(0,-0.5) node[below]$M_4g$;
 draw[thick,->](M4.north) -- ++(0,0.5) node[above]$N_4$;
 draw[dashed]([yshift=-3mm]M4.north east) coordinate (aux1) -- ++(0.7,0) coordinate (aux2);
 draw[thick,->] (aux1) -- ++ (0.7,-0.7) coordinate (aux3) node[below]$T_2$;
 draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] 
 angle = aux3--aux1--aux2;
endtikzpicture
enddocument

enter image description here

Let me try to explain a bit what's going on here.

The positioning library is used to position objects (nodes) relative to each other. For instance, node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$; says that the box M3 should be 2cm right of M2. This has the big advantage that if you decide that the distance between M2 and M3 is to be increased, you only increase 1.5cm and everything else will move automatically. No need to adjust tons of coordinates.

As you see, I use nodes to draw these boxes. Apart from the fact that I do not have to draw the rectangles around the text, I can used the anchors of the node(s) to draw other elements like draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;. Here, I draw an arrow from the middle of the lower boundary, i.e. the south anchor, 0.5cm into the negative y direction and add a node below.

This also helps to draw the circle, where I just attach the arrows to the north and east anchors.

TikZ also has a library that allows one to draw and annotate angles, which is illustrated in draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] angle = aux3--aux1--aux2;.

edited 1 hour ago

answered 1 hour ago

marmot

60.6k464132

documentclass[tikz,border=3.14mm]standalone
usetikzlibrarypositioning,arrows.meta,angles,quotes
begindocument
begintikzpicture[>=Latex,Box/.style=draw,thick,minimum width=10mm,minimum
height=10mm]
 % first box
 node[Box] (M1)$M_1$;
 draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;
 draw[thick,->](M1.north) -- ++(0,0.5) node[above]$T_1$;
 draw[thick,->](M1.east) -- ++(0.5,0) node[right] (N31)$N_31$;
 % second box
 node[Box,right=1mm of N31] (M2)$M_2$;
 draw[thick,->](M2.south) -- ++(0,-0.5) node[below]$M_2g$;
 draw[thick,->](M2.north) -- ++(0,0.5) node[above]$N_32$;
 draw[thick,->](M2.east) -- ++(0.5,0) node[right] (T1)$T_1$;
 % third box
 node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$;
 draw[thick,->](M3.north) -- ++(0,0.5) node[above]$N_3$;
 draw[thick](M3.north east) -- ++(0.3,0.3) node[circle,draw,minimum
 size=3mm,fill=white] (Circ);
 draw[thick,->] (Circ.north) -- ++(-0.5,0) node[left]$T_1$;
 draw[thick,->] (Circ.east) -- ++(0,-0.5) node[below]$T_1$;
 draw[thick,->]([xshift=-4mm]M3.south) -- ++(0,-0.5) node[below]$M_3g$;
 draw[thick,->]([xshift=4mm]M3.south) -- ++(0,-0.5) node[below]$N_23$;
 % fourth box
 node[Box,right=1.5cm of M3,minimum size=1.5cm] (M4)$M_4$;
 draw[thick,->](M4.south) -- ++(0,-0.5) node[below]$M_4g$;
 draw[thick,->](M4.north) -- ++(0,0.5) node[above]$N_4$;
 draw[dashed]([yshift=-3mm]M4.north east) coordinate (aux1) -- ++(0.7,0) coordinate (aux2);
 draw[thick,->] (aux1) -- ++ (0.7,-0.7) coordinate (aux3) node[below]$T_2$;
 draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] 
 angle = aux3--aux1--aux2;
endtikzpicture
enddocument

enter image description here

Let me try to explain a bit what's going on here.

The positioning library is used to position objects (nodes) relative to each other. For instance, node[Box,right=1.5cm of M2,minimum size=2cm] (M3)$M_3$; says that the box M3 should be 2cm right of M2. This has the big advantage that if you decide that the distance between M2 and M3 is to be increased, you only increase 1.5cm and everything else will move automatically. No need to adjust tons of coordinates.

As you see, I use nodes to draw these boxes. Apart from the fact that I do not have to draw the rectangles around the text, I can used the anchors of the node(s) to draw other elements like draw[thick,->](M1.south) -- ++(0,-0.5) node[below]$M_1g$;. Here, I draw an arrow from the middle of the lower boundary, i.e. the south anchor, 0.5cm into the negative y direction and add a node below.

This also helps to draw the circle, where I just attach the arrows to the north and east anchors.

TikZ also has a library that allows one to draw and annotate angles, which is illustrated in draw pic ["$theta$",angle eccentricity=1.33,draw,-,angle radius=4mm] angle = aux3--aux1--aux2;.

edited 1 hour ago

answered 1 hour ago

marmot

60.6k464132

edited 1 hour ago

answered 1 hour ago

marmot

60.6k464132

answered 1 hour ago

marmot

60.6k464132

answered 1 hour ago

marmot

60.6k464132

add a commentÂ |Â

JennyToy is a new contributor. Be nice, and check out our Code of Conduct.

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