Source: Roblox Creator Hub · CC BY 4.0 · View source · Code samples: MIT Imported 2026-10-03. Formatting adapted for this site.
BodyVelocity
Inherits from: BodyMover → Instance → Object
The BodyVelocity object applies a force on an assembly such that it will maintain a constant velocity. The Velocity property, not to be confused with BasePart.AssemblyLinearVelocity, controls the goal velocity.
BodyVelocity is the linear counterpart to BodyAngularVelocity. If you need the assembly to move toward a goal position, use BodyPosition instead. If you need further control on a force applied to an object, consider using a BodyForce or BodyThrust instead.
The strength of the force applied by this object is controlled by several factors, namely the difference between the assembly's current velocity and the goal velocity. This is multiplied by P (power) to either amplify or diminish it. The resulting force is then capped by MaxForce.
Inherits from: BodyMover
Memory category: Instances
Tags: Deprecated
Deprecated: This object is deprecated and should not be used for new work. Use LinearVelocity instead, and see the legacy conversion notes.
Properties
| Name | Type / Returns | Description |
|---|---|---|
| BodyVelocity.MaxForce | Vector3 | Determines the limit on how much force that may be applied to each axis. |
| BodyVelocity.maxForce | Vector3 | |
| BodyVelocity.P | float | Determines how aggressive of a force is applied in reaching the goal velocity. |
| BodyVelocity.Velocity | Vector3 | Determines the goal velocity. |
| BodyVelocity.velocity | Vector3 |
Inherited from Instance
| Name | Type / Returns | Description |
|---|---|---|
| Instance.Archivable | boolean | Determines if an Instance and its descendants can be cloned using Instance:Clone(), and can be saved/published. |
| Instance.archivable | boolean | |
| Instance.Capabilities | SecurityCapabilities | The set of capabilities allowed to be used for scripts inside this container. |
| Instance.IsInSandbox | boolean | Indicates whether the instance is inside a sandboxed container. |
| Instance.Name | string | A non-unique identifier of the Instance. |
| Instance.Parent | Instance | Determines the hierarchical parent of the Instance. |
| Instance.PredictionMode | PredictionMode | Reflects the client-side prediction mode applied to the instance under server-authoritative physics. |
| Instance.RobloxLocked | boolean | A deprecated property that used to protect CoreGui objects. |
| Instance.Sandboxed | boolean | When enabled, the instance can only access abilities in its Capabilities list. |
| Instance.UniqueId | UniqueId | A unique identifier for the instance. |
Inherited from Object
| Name | Type / Returns | Description |
|---|---|---|
| Object.ClassName | string | A read-only string representing the class this Object belongs to. |
| Object.className | string |
BodyVelocity.MaxForce
This property determines the limit on the amount of force that may be applied on each axis in reaching the goal Velocity. If an assembly isn't moving, consider increasing this value and also check that it is not Anchored or attached to any anchored assemblies.
| Field | Value |
|---|---|
| type | Vector3 |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Goals |
| serialization | {"can_load":true,"can_save":true} |
| capabilities | ["Physics"] |
BodyVelocity.maxForce
Deprecated. This property is a deprecated variant of BodyVelocity.MaxForce which should be used instead.
| Field | Value |
|---|---|
| type | Vector3 |
| tags | ["NotReplicated","Deprecated"] |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Goals |
| serialization | {"can_load":true,"can_save":false} |
| capabilities | ["Physics"] |
BodyVelocity.P
This property determines how much power is used while applying force in order to reach the goal Velocity. The higher this value, the more power will be used and the faster it will be used. The force the BodyVelocity exerts increases as the difference between the assembly's current velocity and the goal velocity increases. This property is multiplied to this force to either amplify or diminish it.
| Field | Value |
|---|---|
| type | float |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Goals |
| serialization | {"can_load":true,"can_save":true} |
| capabilities | ["Physics"] |
BodyVelocity.Velocity
This property (not to be confused with BasePart.Velocity) determines the target velocity towards which force will be exerted. It is specified relative to the world, not the assembly.
| Field | Value |
|---|---|
| type | Vector3 |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Goals |
| serialization | {"can_load":true,"can_save":true} |
| capabilities | ["Physics"] |
BodyVelocity.velocity
Deprecated. This property is a deprecated variant of BodyVelocity.Velocity which should be used instead.
| Field | Value |
|---|---|
| type | Vector3 |
| tags | ["NotReplicated","Deprecated"] |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Goals |
| serialization | {"can_load":true,"can_save":false} |
| capabilities | ["Physics"] |
Methods
| Name | Type / Returns | Description |
|---|---|---|
| BodyVelocity:GetLastForce | Vector3 | Not implemented and will always return the 0 vector. |
| BodyVelocity:lastForce | Vector3 | Returns the last force in the object. |
Inherited from Instance
| Name | Type / Returns | Description |
|---|---|---|
| Instance:AddTag | () | Applies a tag to the instance. |
| Instance:children | Instances | Returns an array of the object's children. |
| Instance:ClearAllChildren | () | This method destroys all of an instance's children. |
| Instance:Clone | Instance | Create a copy of an instance and all its descendants, ignoring instances that are not Archivable. |
| Instance:clone | Instance | |
| Instance:Destroy | () | Sets the Instance.Parent property to nil, locks the Instance.Parent property, disconnects all connections, and calls Destroy() on all children. |
| Instance:destroy | () | |
| Instance:FindFirstAncestor | Instance? | Returns the first ancestor of the Instance whose Instance.Name is equal to the given name. |
| Instance:FindFirstAncestorOfClass | Instance? | Returns the first ancestor of the Instance whose Object.ClassName is equal to the given className. |
| Instance:FindFirstAncestorWhichIsA | Instance? | Returns the first ancestor of the Instance for whom Object:IsA() returns true for the given className. |
| Instance:FindFirstChild | Instance? | Returns the first child of the Instance found with the given name. |
| Instance:findFirstChild | Instance | |
| Instance:FindFirstChildOfClass | Instance? | Returns the first child of the Instance whose ClassName is equal to the given class name. |
| Instance:FindFirstChildWhichIsA | Instance? | Returns the first child of the Instance for whom Object:IsA() returns true for the given className. |
| Instance:FindFirstDescendant | Instance? | Returns the first descendant found with the given Instance.Name. |
| Instance:GetActor | Actor? | Returns the Actor associated with the Instance, if any. |
| Instance:GetAttribute | Variant | Returns the value which has been assigned to the given attribute name. |
| Instance:GetAttributeChangedSignal | RBXScriptSignal | Returns an event that fires when the given attribute changes. |
| Instance:GetAttributes | Dictionary | Returns a dictionary of the instance's attributes. |
| Instance:GetChildren | Instances | Returns an array containing all of the instance's children. |
| Instance:getChildren | Instances | |
| Instance:GetDebugId | string | Returns a coded string of the debug ID used internally by Roblox. |
| Instance:GetDescendants | Instances | Returns an array containing all of the descendants of the instance. |
| Instance:GetFullName | string | Returns a string describing the instance's ancestry. |
| Instance:GetStyled | Variant | Returns the styled or explicitly modified value of the specified property, or else the default property value if it hasn't been styled/modified. |
| Instance:GetStyledPropertyChangedSignal | RBXScriptSignal | Returns an event that fires when the given style property changes on the instance. |
| Instance:GetTags | Array | Gets an array of all tags applied to the instance. |
| Instance:HasTag | boolean | Check whether the instance has a given tag. |
| Instance:IsAncestorOf | boolean | Returns true if an Instance is an ancestor of the given descendant. |
| Instance:IsDescendantOf | boolean | Returns true if an Instance is a descendant of the given ancestor. |
| Instance:isDescendantOf | boolean | |
| Instance:IsPropertyModified | boolean | Returns true if the value stored in the specified property is not equal to the code-instantiated default. |
| Instance:QueryDescendants | Instances | Returns an array containing all descendants of the instance that match the selector string. |
| Instance:Remove | () | Sets the object's Parent to nil, and does the same for all its descendants. |
| Instance:remove | () | |
| Instance:RemoveTag | () | Removes a tag from the instance. |
| Instance:ResetPropertyToDefault | () | Resets a property to its default value. |
| Instance:SetAttribute | () | Sets the attribute with the given name to the given value. |
| Instance:WaitForChild | Instance | Returns the child of the Instance with the given name. If the child does not exist, it will yield the current thread until it does. |
Inherited from Object
| Name | Type / Returns | Description |
|---|---|---|
| Object:GetPropertyChangedSignal | RBXScriptSignal | Get an event that fires when a given property of the object changes. |
| Object:IsA | boolean | Returns true if an object's class matches or inherits from a given class. |
| Object:isA | boolean |
BodyVelocity:GetLastForce
This method is not implemented and it will always return the 0 vector. You are advised to use AlignPosition instead.
Returns
| Type | Description |
|---|---|
| Vector3 |
| Field | Value |
|---|---|
| security | None |
| thread safety | Unsafe |
| capabilities | ["Physics"] |
BodyVelocity:lastForce
Returns the last force in the object.
Returns
| Type | Description |
|---|---|
| Vector3 |
| Field | Value |
|---|---|
| security | None |
| thread safety | Unsafe |
| capabilities | ["Physics"] |
Events
Inherited from Instance
| Name | Type / Returns | Description |
|---|---|---|
| Instance.AncestryChanged | Fires when the Instance.Parent property of this object or one of its ancestors is changed. | |
| Instance.AttributeChanged | Fires whenever an attribute is changed on the Instance. | |
| Instance.ChildAdded | Fires after an object is parented to this Instance. | |
| Instance.childAdded | ||
| Instance.ChildRemoved | Fires after a child is removed from this Instance. | |
| Instance.DescendantAdded | Fires after a descendant is added to the Instance. | |
| Instance.DescendantRemoving | Fires immediately before a descendant of the Instance is removed. | |
| Instance.Destroying | Fires immediately before (or is deferred until after) the instance is destroyed via Instance:Destroy(). | |
| Instance.StyledPropertiesChanged | Fires whenever any style property is changed on the instance, including when a property is set to nil. |
Inherited from Object
| Name | Type / Returns | Description |
|---|---|---|
| Object.Changed | Fires immediately after a property of the object changes, with some limitations. |