Build Physics

Interactive Physics Lab

Experiment

Run duration Auto-pause after

Leave blank to run until you stop it.

t = 0.00 s

Speed

Edit

Files

Display

Color theme Text size Graphics quality

Keyboard shortcuts

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

Guide

How does position change at constant velocity?

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

Workspace

Create

Add objects, surfaces, forces, connections, and other elements to your simulation.

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 Vector 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

Ground/contact mode matches the AP Physics 1 point-mass convention: an object resting on the reference surface has U_g = 0. Changing the reference changes energy values, not motion.

Height convention

Show and 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

Properties

Nothing selected

Live measurements Calculated

Editable properties Editable

Select an object to view and edit its properties.

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.

Data

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

Inspect sample

Click the graph to inspect a sampled point.

First Push

System totals

More

Choose an experiment

Resources

Welcome

Tutorials

Welcome to

What do you want to do today?

Power Core: Physics Trials

Power restored!

Send Feedback

Tutorial complete

What would you like to do next?

Physics Lessons

Unit 1 Kinematics

Unit 2 Force and Translational Dynamics

Unit 3 Work, Energy, and Power

Advanced Tutorials

Save Scene

Save Scene to My Account

Sign in to Build Physics

Sign in with email and password

Check your email

Cloud save did not finish

My Worlds

Account

Sandbox diagnostics

Two-dimensional physics experiment

First Push

More