Lagmite processes kinematics in physics by utilizing either task cards, unit cards, or formula cards. Also, gravity on Earth (denoted by $g$) is equal to 9.80665 m/s². (See source)

To change gravity to its appropriate value (such as 10 m/s² which is commonly used for school), use the following syntax before storing the other values:

str [expr] 10 <m/s> /g/

This uses the formula card of /g/, which by default has a value of 9.80665 m/s². When not expressed, it will always revert to the default value.

Linear Motion

Kinematics represents the motion of objects or particles. In kinematics, there are three general things to consider:

• Velocity or speed is how fast an object travels. A speed of 4 m/s means every 1 second the object travels 4 meters.
• Distance or displacement is how far the object has travelled.
• Acceleration is the change of speed in a time. For instance, 8 m/s² means that the object is constantly adding speed of 8 m/s every 1 second.

$$ v = \frac{\Delta x}{t} $$

$$ \Delta x = x_{\text{f}} - x_{\text{i}} $$

$$ a = \frac{v_{\text{f}} - v_{\text{i}}}{t} $$

The formula cards that can be used are:

• /v/ which returns the velocity of an object. /v::f/ is the final velocity of an object. /v::i/ is the initial velocity of an object.
• /x/ which returns the displacement of an object. /x::f/ is the final displacement of an object. /x::i/ is the initial displacement of an object (initial position.
• /a/, which returns the acceleration of an object.
• /t/, which returns the time taken for the acceleration process.

As a first example, return the displacement of an object if known its velocity is 2 m/s travelling for 60 seconds. To do this, we can use the syntax:

str [expr] 2 <m/s> /v/
str [expr] 60 <s> /t/
disp [text] (calc [expr] /x/)

//Expected result: 120 m