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Question by davidflynn2 · Sep 21, 2012 at 07:18 PM · gameballcs

Adding Force to a rolling ball

I have a game im building for a class project that is a ball track. The ball rolles down the track from an angle and should roll to the end. The problem is I can not get enough momentum from my hill for it to make it to the end.

What im needing is a way to add force to the ball when it rolls though an invisible collider on the track. I want it to add the force in the same direction its going.

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avatar image Fattie · Sep 22, 2012 at 05:46 AM 0
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Look in the Unity documentation for "AddForce".

moreover, you probably want "AddTorque" rather than AddForce in this situation.

If you really struggle with junior-high physic conceptss like force, mass, acceleration, torque, gravity, friction and so on ... working with a game engine is going to be a real struggle.

If you are unfamiliar with these concepts, I urge you to study them hard using the many resources available on the www.

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Answer by CaioRosisca · Sep 22, 2012 at 02:32 AM

I'm not sure if i understood it, first of all I would add a rigidbody to the ball, once it has one add the following code:

 rigidbody.AddForce(0, -forceValue,0);

This will add negative force to your ball on the y axis(relative to world space). So it the ball is actually rolling "down"..it will move faster.

Hope it helps.

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