Why does VectorForce not apply velocity to a part

The Building Support sub-category is intended for all development support relating to architecture on the Roblox platform. This includes questions ranging in difficulty from extremely basic to even the most technical of issues.

You may present your thread how you choose, but you are required to answer the following questions in your thread;

  • What are you attempting to achieve? (Keep it simple and clear)
    Im trying to make a car system for my brother
  • What is the issue? (Keep it simple and clear - Include screenshots/videos/GIFs if possible)
    It does not works as the vector force does not change AsembelyLinearVelocity instead it does nothing
  • What solutions have you tried so far? (Have you searched for solutions through the Roblox Wiki yet?)
    I have tryed:
    Seeing if other people had the same problem and
    Using another velocity

You may then include any further details.
Heres some videos:

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Your vector force probably needs to have it’s Attachment0 set. The Attachment0 determines which direction the force should go in, and it out it, the VectorForce doesn’t do anything.

Here are some instructions:

  • Create a VectorForce inside your car
  • Add an Attachment to a BasePart in your car (ex: the seat)
  • Open up the properties of the VectorForce
  • Set the VectorForce.Attachment0 to the new attachment
  • Set the VectorForce.RelativeTo to Attachment0
  • (Make sure Active and Enabled are checked on)
  • Set VectorForce.Force to something like (0, 0, 1000000) (or even higher if it doesn’t move)

I found a few posts when I searched VectorForce not moving car.

Is any Part of the car Anchored?
Are there any stray welds that have been created joining a Part of the car to an Anchored item like the Baseplat? You can check by going to the Model tab in Studio and in the Constraints section check the “Show Welds” button. Active welds between unanchored parts will be green lines. Welds to Anchored Parts will be grey. It’s an easy way to also tell you which part of a vehicle is accidentally anchored.

VectorForce is broken. Just use BodyForce.

BodyForce is old and nobody should use it

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:nerd:

buddy, just because something is old doesn’t mean nobody should use it. BodyForce is PROVEN. quite literally proven to be faster than the new bodymovers.

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Bodyforce works. Vectorforce doesn’t. Is there anything else that needs to be said about which one of them should be used?

Both VectorForce and BodyForce have positive and negative features depending on what you’re using them for.

VectorForces have multiple ways of setting them up through their different Properties.
I’ve seen many people say they don’t work only because they haven’t set the Properties the way they need to be for their situations.
Unfortunately the Roblox documentation for many items is very vague and hard to understand for someone just learning about these items.

VectorForces work great for the boats and trains I’ve used them in.