Basic Physics

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Roblox physics allows developers to create realistic interactions and movements within their games. Understanding and manipulating physics components can greatly enhance gameplay and immersion.

Components	Description	Use Case
BodyForce	Applies a constant force to a part.	Simulating continuous thrust, such as a rocket engine.
BodyVelocity	Maintains a specified velocity by adjusting the applied force.	Keeping a vehicle or platform moving at a constant speed.
BodyPosition	Moves a part to a specified position and keeps it there.	Creating a part that moves to and holds a target position, like an elevator.
BodyGyro	Maintains a part’s orientation using torque.	Stabilizing a part's rotation, such as keeping a rocket upright.
BodyAngularVelocity	Applies a constant rotational speed to a part.	Rotating a part at a constant speed, like a spinning fan.

Basic Physics Examples

BodyVelocity

This component applies a continuous force to maintain a specific velocity in a chosen direction, overriding other forces acting on the part.

Roblox Studio

local parentPart = script.Parent -- Reference to the parent part

local velocity = Instance.new("BodyVelocity")
velocity.Velocity = Vector3.new(0, 50, 0) -- Move upward 
velocity.MaxForce = Vector3.new(0, 10000, 0) -- Apply force on Y axes
velocity.Parent = parentPart -- Apply the BodyVelocity to the parent part

Velocity

This sets an initial upward velocity. The velocity will decrease over time due to external forces like gravity and friction.

Roblox Studio

local parentPart = script.Parent -- Reference to the parent part

parentPart.Velocity = Vector3.new(0, 50, 0) -- Move upward

BodyForce

This component applies a continuous force in a specific direction, often used to counteract gravity or simulate constant acceleration. Unlike BodyVelocity, it does not directly control speed but rather influences movement by adding a consistent force.

Roblox Studio

local parentPart = script.Parent -- Reference to the parent part

local force = Instance.new("BodyForce")
force.Force = Vector3.new(0, 5000, 0) -- Apply upward force of 5000 on the Y-axis
force.Parent = parentPart -- Apply the BodyForce to the parent part

BodyGyro

This continuously applies force to move the part to the specified position and keeps it there, overriding any external forces.

Roblox Studio

local parentPart = script.Parent -- Reference to the parent part

local gyro = Instance.new("BodyGyro")
gyro.CFrame = CFrame.Angles(math.rad(45), math.rad(30), 0) -- Desired rotation
gyro.MaxTorque = Vector3.new(4000, 4000, 4000) -- Maximum torque applied on each axis
gyro.P = 3000 -- Power
gyro.Parent = parentPart -- Apply the BodyGyro to the parent part

BodyPosition

This continuously applies force to move the part to the specified position and keeps it there, counteracting any external forces.

Roblox Studio

local parentPart = script.Parent -- Reference to the parent part

local position = Instance.new("BodyPosition")
position.Position = Vector3.new(0, 5, 0) -- Target position
position.MaxForce = Vector3.new(4000, 4000, 4000) -- Maximum force applied to reach the target position
position.D = 1000 -- Damping
position.P = 5000 -- Power
position.Parent = parentPart -- Apply the BodyPosition to the parent part

BodyAngularVelocity

This continuously applies torque to maintain a constant rotational speed around the Y-axis, overriding any resistive forces.

Roblox Studio

local parentPart = script.Parent -- Reference to the parent part

local angularVelocity = Instance.new("BodyAngularVelocity")
angularVelocity.AngularVelocity = Vector3.new(0, 2, 0) -- Rotate around Y-axis
angularVelocity.MaxTorque = Vector3.new(0, 10000, 0) -- Maximum torque applied
angularVelocity.Parent = parentPart -- Apply the BodyAngularVelocity to the parent part