public void initialize(double strength, double delay, Vector3d position,
			Vector3d linearVelocity, Vector3d angularVelocity,
			double restitution, double friction, double mass) {
		super.initialize(position, new Quat4d(0, 0, 0, 1), linearVelocity,
				angularVelocity, restitution, friction, mass, new SphereObject(
						radius), delay + duration, null);
		this.strength = strength;
		this.delay = delay;
	}