Build Physics

Interactive Physics Lab

Experiment

t = 0.000 s

Speed

Trial

Edit

Files

Display

Color theme Text size

Keyboard shortcuts

Run / pause SpaceReset R Single step .Focus view F Undo Ctrl ZSelect tool S or Esc

Investigation focus

How does position change at constant velocity?

1Change one input
2Run the trial
3Explain the graph

Workspace

Setup & tools

Object Builder

Advanced tools are optional. Use a prepared experiment first, then build your own model.

World Conditions

These are controlled inputs. Change one at a time for a fair comparison.

Include gravity

Gravity, g_x

m/s²

Gravity, g_y

m/s²

Linear drag, b

N·s/m

Include friction

Motion & Vector Display

Grid and coordinate axes Motion trail Velocity vectors Acceleration vectors Angular Velocity Vector Angular Acceleration Vector Vector snapping Vector values and units x- and y-components Force components ∥ and ⟂ to velocity Direction angles System center of mass

Force Types Display

Show all available forces

Weight, F_g Normal force, F_N Applied force, F_app Spring force, F_s Tension, F_T Joint force Friction force, F_f Net force, ΣF Only show forces on selected object

Potential-energy reference

Changing h = 0 changes the numerical value of gravitational potential energy, not the motion.

Use a custom U_g = 0 line

Reference height

Objects

Choose an object to see its live measurements and editable properties.

Experiment options

Unit Limited Settings

When on, the interface only shows tools, settings, and measurements introduced through this experiment’s unit. Turn it off to temporarily show every app feature.

ReadyPrepared experiment loaded.

Select and inspect

Choose an object to inspect it. Drag an object while paused, or press Run to begin the trial.

Live model

Object inspector

Nothing selected

Live measurements Calculated

Object properties Editable

Choose an object in the world or the object list.

Vector key

Velocity, v

Acceleration, a

Angular velocity, ω

Angular acceleration, α

Weight, Fg

Normal, FN

Applied, Fapp

Net, ΣF

Interpretation for screen readers

Trial data actions

Measurements are sampled from simulated time at 30 Hz. Display settings do not erase collected data.

Analyze

Graph: selected object versus timeChoose a measurementPress Esc to exit · Use the sample slider for exact values

Inspect sample

Click the graph to inspect a sampled point.

System totals

Welcome

Tutorials

Welcome to Build Physics

Learn the essentials in about two minutes

Tutorial complete

What would you like to do next?

Advanced Tutorials

Sandbox diagnostics

Two-dimensional physics experiment